Exceptional Case Marking in translation, often abbreviated ECM, occurs when the understood subject of a nonfinite infinitival clause receives accusative or object-like case from a higher matrix verb. English examples include I believe him to be honest and I expect John to win. Cambridge work on raising explicitly identifies subject-to-object raising, accusative-and-infinitive and Exceptional Case Marking as related labels for this constructional family.
People searching for Exceptional Case Marking, ECM syntax, accusative with infinitive, accusativus cum infinitivo, raising to object, subject-to-object raising are solving a two-clause role problem. The NP can look like an object of the matrix verb for case and syntax while remaining the semantic subject of the embedded infinitive. Translation precision therefore requires separating where the NP gets case from where it gets its semantic role.
This article owns the ECM / Accusative-with-Infinitive precision layer for eduKateSG. It does not replace Complement Clauses, Verb Valency, Passive Voice or Raising/Control work. Its narrow task is to preserve the embedded subject, matrix case licensing and raising relation, while distinguishing ECM from object control, perception complements and ordinary finite reported speech.
Quick Read
Write MATRIX VERB, ECM NP, LOWER PREDICATE, NP’S LOWER ROLE and CASE LICENSOR. If the NP is semantically selected only by the lower predicate but receives matrix object-like case, you likely have ECM/raising rather than object control.
One-Sentence Answer
Translate ECM by preserving the NP as subject of the infinitival event even when its surface case makes it look like a matrix object.
Why This Precision Layer Matters
ECM splits syntax across clause boundaries. Case points upward; semantic predication points downward. If those two relations are collapsed, believe becomes persuade, expletives acquire fake referents or the embedded subject disappears during restructuring.
What Exceptional Case Marking Is
The first task is to separate case licensing from semantic selection. Exceptional Case Marking, often abbreviated ECM, is a construction where the understood subject of an infinitival clause receives accusative/object-like case from a higher matrix verb rather than ordinary nominative case from its own clause. ECM is lexically restricted and language-specific, so similar NP+infinitive strings can instead be control, perception or small-clause constructions.
The main translation risk is treating the accusative NP as a normal semantic object of the matrix verb and changing the predicate relationship. Because the NP occupies object-like syntax, a model can assign it an unwanted matrix semantic role. The lower predicate must therefore be reconstructed explicitly before target phrasing.
A practical diagnostic is to identify the NP as subject of the infinitive before interpreting matrix case. For example, in ‘I believe him to be honest,’ him is the understood subject of be honest, not the theme of believe in the ordinary object sense. Once matrix and lower roles are secure, choose the target’s natural ECM, that-clause or passive-raising construction.
Accusative with Infinitive
This construction requires a matrix frame and a lower infinitival frame. Traditional grammar calls closely related structures accusativus cum infinitivo or accusative-with-infinitive, especially in Latin and European grammatical traditions. ECM is lexically restricted and language-specific, so similar NP+infinitive strings can instead be control, perception or small-clause constructions.
The main translation risk is translating the accusative noun and infinitive as two separate object-like complements. Because the NP occupies object-like syntax, a model can assign it an unwanted matrix semantic role. The lower predicate must therefore be reconstructed explicitly before target phrasing.
A practical diagnostic is to treat the pair as one embedded predication. For example, Latin-style ‘I believe him to be wise’ packages him as embedded subject under matrix accusative. Once matrix and lower roles are secure, choose the target’s natural ECM, that-clause or passive-raising construction.
Raising to Object
A precise translation identifies whether the NP is a true matrix object or a raised embedded subject. ECM is also discussed as subject-to-object raising or raising-to-object because the embedded subject behaves like an object of the matrix clause for case/syntax while remaining the semantic subject of the lower predicate. ECM is lexically restricted and language-specific, so similar NP+infinitive strings can instead be control, perception or small-clause constructions.
The main translation risk is assuming syntactic objecthood makes it semantic object of the higher verb. Because the NP occupies object-like syntax, a model can assign it an unwanted matrix semantic role. The lower predicate must therefore be reconstructed explicitly before target phrasing.
A practical diagnostic is to write MATRIX PREDICATE and LOWER PREDICATE roles separately. For example, John in ‘I expect John to win’ is expected to be the winner, not something that expect acts upon. Once matrix and lower roles are secure, choose the target’s natural ECM, that-clause or passive-raising construction.
The Embedded Subject
The target may replace ECM with a finite that-clause while preserving one referent. The ECM noun phrase belongs semantically to the infinitival predicate. ECM is lexically restricted and language-specific, so similar NP+infinitive strings can instead be control, perception or small-clause constructions.
The main translation risk is assigning lower predicate to the matrix subject. Because the NP occupies object-like syntax, a model can assign it an unwanted matrix semantic role. The lower predicate must therefore be reconstructed explicitly before target phrasing.
A practical diagnostic is to draw LOWER EVENT(NP) before matrix interpretation. For example, him is honest / John wins are the lower propositions. Once matrix and lower roles are secure, choose the target’s natural ECM, that-clause or passive-raising construction.
Matrix Case Licensing
Pronoun case should be checked only after lower semantic roles are clear. The higher verb licenses accusative or object-like case on the embedded subject because the infinitive lacks ordinary finite nominative assignment in many analyses. ECM is lexically restricted and language-specific, so similar NP+infinitive strings can instead be control, perception or small-clause constructions.
The main translation risk is translating accusative morphology as object semantics. Because the NP occupies object-like syntax, a model can assign it an unwanted matrix semantic role. The lower predicate must therefore be reconstructed explicitly before target phrasing.
A practical diagnostic is to separate CASE SOURCE from SEMANTIC ROLE. For example, him is accusative because of matrix syntax but semantically subject of be. Once matrix and lower roles are secure, choose the target’s natural ECM, that-clause or passive-raising construction.
Finite vs Nonfinite Complement
The first task is to separate case licensing from semantic selection. ECM typically contrasts with a finite that-clause where the same embedded subject is nominative. ECM is lexically restricted and language-specific, so similar NP+infinitive strings can instead be control, perception or small-clause constructions.
The main translation risk is treating the two paraphrases as having different participants. Because the NP occupies object-like syntax, a model can assign it an unwanted matrix semantic role. The lower predicate must therefore be reconstructed explicitly before target phrasing.
A practical diagnostic is to compare ‘I believe that he is honest’ with ‘I believe him to be honest’. For example, he/him refer to the same embedded subject under different case environments. Once matrix and lower roles are secure, choose the target’s natural ECM, that-clause or passive-raising construction.
Believe-Class Verbs
This construction requires a matrix frame and a lower infinitival frame. English verbs such as believe, consider, expect, judge and suppose can license ECM-like structures to varying degrees. ECM is lexically restricted and language-specific, so similar NP+infinitive strings can instead be control, perception or small-clause constructions.
The main translation risk is using ECM with every attitude verb because meanings are similar. Because the NP occupies object-like syntax, a model can assign it an unwanted matrix semantic role. The lower predicate must therefore be reconstructed explicitly before target phrasing.
A practical diagnostic is to check the lexical subcategorisation of the matrix verb. For example, believe him to be… is grammatical, while other verbs may require that-clauses. Once matrix and lower roles are secure, choose the target’s natural ECM, that-clause or passive-raising construction.
Perception Verbs
A precise translation identifies whether the NP is a true matrix object or a raised embedded subject. See, hear, feel and related perception verbs can take bare infinitive or participial complements with object-like embedded subjects, but these constructions differ from canonical to-infinitival ECM in important ways. ECM is lexically restricted and language-specific, so similar NP+infinitive strings can instead be control, perception or small-clause constructions.
The main translation risk is calling every object+infinitive construction ECM without checking complement type. Because the NP occupies object-like syntax, a model can assign it an unwanted matrix semantic role. The lower predicate must therefore be reconstructed explicitly before target phrasing.
A practical diagnostic is to identify bare infinitive, to-infinitive or participle. For example, I saw him leave differs structurally/semantically from I believed him to leave. Once matrix and lower roles are secure, choose the target’s natural ECM, that-clause or passive-raising construction.
Expect-Type Futures
The target may replace ECM with a finite that-clause while preserving one referent. Expect can introduce future-oriented or prospective infinitival content with an accusative subject. ECM is lexically restricted and language-specific, so similar NP+infinitive strings can instead be control, perception or small-clause constructions.
The main translation risk is translating the ECM object as recipient of expectation rather than participant in expected event. Because the NP occupies object-like syntax, a model can assign it an unwanted matrix semantic role. The lower predicate must therefore be reconstructed explicitly before target phrasing.
A practical diagnostic is to map EXPECT[EVENT(NP)]. For example, I expect her to arrive = her arrival is expected. Once matrix and lower roles are secure, choose the target’s natural ECM, that-clause or passive-raising construction.
Consider-Type Predication
Pronoun case should be checked only after lower semantic roles are clear. Consider can combine an NP with infinitival or small-clause predication. ECM is lexically restricted and language-specific, so similar NP+infinitive strings can instead be control, perception or small-clause constructions.
The main translation risk is translating consider NP as think-about NP and dropping the predicate. Because the NP occupies object-like syntax, a model can assign it an unwanted matrix semantic role. The lower predicate must therefore be reconstructed explicitly before target phrasing.
A practical diagnostic is to distinguish consider NP vs consider NP to be AP/NP. For example, I consider him to be reliable asserts a judgment of reliability. Once matrix and lower roles are secure, choose the target’s natural ECM, that-clause or passive-raising construction.
Prove/Show-Type Constructions
The first task is to separate case licensing from semantic selection. Some predicates license raising-like infinitival subjects under passive or evidential structures. ECM is lexically restricted and language-specific, so similar NP+infinitive strings can instead be control, perception or small-clause constructions.
The main translation risk is forcing an object-control interpretation. Because the NP occupies object-like syntax, a model can assign it an unwanted matrix semantic role. The lower predicate must therefore be reconstructed explicitly before target phrasing.
A practical diagnostic is to test whether the matrix verb semantically selects the NP. For example, he proved to be wrong differs from prove him wrong/to be wrong patterns. Once matrix and lower roles are secure, choose the target’s natural ECM, that-clause or passive-raising construction.
ECM vs Object Control
This construction requires a matrix frame and a lower infinitival frame. Object-control verbs such as persuade/order/force select a matrix object that also controls the infinitive subject; ECM verbs do not assign an independent semantic role to the NP in the same way. ECM is lexically restricted and language-specific, so similar NP+infinitive strings can instead be control, perception or small-clause constructions.
The main translation risk is treating believe him to leave like persuade him to leave. Because the NP occupies object-like syntax, a model can assign it an unwanted matrix semantic role. The lower predicate must therefore be reconstructed explicitly before target phrasing.
A practical diagnostic is to ask whether the matrix verb semantically acts on the NP. For example, persuade him involves him as persuadee; believe him to be honest does not require belief directed at him as an object. Once matrix and lower roles are secure, choose the target’s natural ECM, that-clause or passive-raising construction.
Control Diagnostics
A precise translation identifies whether the NP is a true matrix object or a raised embedded subject. In control, the matrix verb semantically selects the controller; in ECM/raising, the NP’s semantic role comes primarily from the embedded predicate. ECM is lexically restricted and language-specific, so similar NP+infinitive strings can instead be control, perception or small-clause constructions.
The main translation risk is using surface NP+to-V shape as sufficient diagnosis. Because the NP occupies object-like syntax, a model can assign it an unwanted matrix semantic role. The lower predicate must therefore be reconstructed explicitly before target phrasing.
A practical diagnostic is to compare expletives and idiom chunks. For example, ECM can allow expletive there/it or idiom parts that control verbs cannot semantically select. Once matrix and lower roles are secure, choose the target’s natural ECM, that-clause or passive-raising construction.
Expletive There
The target may replace ECM with a finite that-clause while preserving one referent. ECM can often license existential there as the embedded subject because the matrix verb need not assign it a semantic role. ECM is lexically restricted and language-specific, so similar NP+infinitive strings can instead be control, perception or small-clause constructions.
The main translation risk is treating there as a location object of the matrix verb. Because the NP occupies object-like syntax, a model can assign it an unwanted matrix semantic role. The lower predicate must therefore be reconstructed explicitly before target phrasing.
A practical diagnostic is to identify expletive status. For example, I believe there to be a problem supports raising/ECM analysis. Once matrix and lower roles are secure, choose the target’s natural ECM, that-clause or passive-raising construction.
Expletive It
Pronoun case should be checked only after lower semantic roles are clear. Weather/extraposition it can appear in ECM-type structures under verbs that permit it. ECM is lexically restricted and language-specific, so similar NP+infinitive strings can instead be control, perception or small-clause constructions.
The main translation risk is translating it as a concrete object. Because the NP occupies object-like syntax, a model can assign it an unwanted matrix semantic role. The lower predicate must therefore be reconstructed explicitly before target phrasing.
A practical diagnostic is to classify it as nonreferential embedded subject. For example, I believe it to be raining does not mean I believe an object called it. Once matrix and lower roles are secure, choose the target’s natural ECM, that-clause or passive-raising construction.
Idiomatic Subjects
The first task is to separate case licensing from semantic selection. Parts of idioms can occur as ECM subjects while preserving idiomatic meaning, supporting the idea that the matrix predicate does not assign them an independent theta role. ECM is lexically restricted and language-specific, so similar NP+infinitive strings can instead be control, perception or small-clause constructions.
The main translation risk is literalising idiom pieces because they appear as matrix objects. Because the NP occupies object-like syntax, a model can assign it an unwanted matrix semantic role. The lower predicate must therefore be reconstructed explicitly before target phrasing.
A practical diagnostic is to test whether the lower predicate forms an idiom with the NP. For example, the cat in an idiomatic lower phrase can remain idiomatic under raising. Once matrix and lower roles are secure, choose the target’s natural ECM, that-clause or passive-raising construction.
Case Form in English Pronouns
This construction requires a matrix frame and a lower infinitival frame. English visibly shows ECM case in pronouns: him/her/me/us/them rather than he/she/I/we/they. ECM is lexically restricted and language-specific, so similar NP+infinitive strings can instead be control, perception or small-clause constructions.
The main translation risk is using nominative pronouns because the NP is semantically an embedded subject. Because the NP occupies object-like syntax, a model can assign it an unwanted matrix semantic role. The lower predicate must therefore be reconstructed explicitly before target phrasing.
A practical diagnostic is to apply target case syntax. For example, I believe him to be right, not *I believe he to be right. Once matrix and lower roles are secure, choose the target’s natural ECM, that-clause or passive-raising construction.
Full NPs and Invisible Case
A precise translation identifies whether the NP is a true matrix object or a raised embedded subject. Full English noun phrases do not visibly distinguish nominative and accusative morphology, so ECM can be easy to miss. ECM is lexically restricted and language-specific, so similar NP+infinitive strings can instead be control, perception or small-clause constructions.
The main translation risk is assuming there is no case relation because John looks the same everywhere. Because the NP occupies object-like syntax, a model can assign it an unwanted matrix semantic role. The lower predicate must therefore be reconstructed explicitly before target phrasing.
A practical diagnostic is to use syntactic distribution rather than surface form. For example, I believe John to be right still has ECM structure. Once matrix and lower roles are secure, choose the target’s natural ECM, that-clause or passive-raising construction.
Passivisation
The target may replace ECM with a finite that-clause while preserving one referent. ECM subjects can often raise to matrix subject under passive: ‘John is believed to be honest.’ ECM is lexically restricted and language-specific, so similar NP+infinitive strings can instead be control, perception or small-clause constructions.
The main translation risk is translating the passive as if John became semantic patient of believe rather than subject of honest. Because the NP occupies object-like syntax, a model can assign it an unwanted matrix semantic role. The lower predicate must therefore be reconstructed explicitly before target phrasing.
A practical diagnostic is to reconstruct active ECM paraphrase. For example, John is believed [John to be honest]. Once matrix and lower roles are secure, choose the target’s natural ECM, that-clause or passive-raising construction.
Nominative-with-Infinitive
Pronoun case should be checked only after lower semantic roles are clear. The passive counterpart is traditionally called nominativus cum infinitivo in some traditions: the raised NP appears nominative as matrix subject while semantically belonging to the infinitive. ECM is lexically restricted and language-specific, so similar NP+infinitive strings can instead be control, perception or small-clause constructions.
The main translation risk is treating NCI as ordinary lexical subject of the matrix passive predicate only. Because the NP occupies object-like syntax, a model can assign it an unwanted matrix semantic role. The lower predicate must therefore be reconstructed explicitly before target phrasing.
A practical diagnostic is to map lower subject relation first. For example, John is said to be ill = John is the one who is ill. Once matrix and lower roles are secure, choose the target’s natural ECM, that-clause or passive-raising construction.
Latin AcI
The first task is to separate case licensing from semantic selection. Latin famously uses accusative-with-infinitive after verbs of saying, thinking, perceiving and similar predicates. ECM is lexically restricted and language-specific, so similar NP+infinitive strings can instead be control, perception or small-clause constructions.
The main translation risk is translating Latin accusative as direct object and infinitive as purpose/complement separately. Because the NP occupies object-like syntax, a model can assign it an unwanted matrix semantic role. The lower predicate must therefore be reconstructed explicitly before target phrasing.
A practical diagnostic is to reconstruct the embedded proposition. For example, dicit eum venire-type structure = he says that he is coming. Once matrix and lower roles are secure, choose the target’s natural ECM, that-clause or passive-raising construction.
Latin Reflexive Subjects
This construction requires a matrix frame and a lower infinitival frame. Latin indirect discourse can use reflexive se in AcI to refer back to the matrix subject. ECM is lexically restricted and language-specific, so similar NP+infinitive strings can instead be control, perception or small-clause constructions.
The main translation risk is translating se as an ordinary third-person pronoun with wrong antecedent. Because the NP occupies object-like syntax, a model can assign it an unwanted matrix semantic role. The lower predicate must therefore be reconstructed explicitly before target phrasing.
A practical diagnostic is to resolve reflexive logophoric reference. For example, speaker/thinker reference can be encoded through reflexive accusative. Once matrix and lower roles are secure, choose the target’s natural ECM, that-clause or passive-raising construction.
Greek AcI
A precise translation identifies whether the NP is a true matrix object or a raised embedded subject. Ancient Greek also uses accusative-and-infinitive constructions in reported speech and complementation. ECM is lexically restricted and language-specific, so similar NP+infinitive strings can instead be control, perception or small-clause constructions.
The main translation risk is assuming Latin tense/reference rules transfer exactly. Because the NP occupies object-like syntax, a model can assign it an unwanted matrix semantic role. The lower predicate must therefore be reconstructed explicitly before target phrasing.
A practical diagnostic is to analyse Greek infinitive tense/aspect and subject reference independently. For example, similar surface AcI can differ in temporal/aspectual details. Once matrix and lower roles are secure, choose the target’s natural ECM, that-clause or passive-raising construction.
English ECM vs Latin AcI
The target may replace ECM with a finite that-clause while preserving one referent. English ECM is lexically restricted and not a general replacement for finite reported speech, while Latin AcI is much more central in indirect statement. ECM is lexically restricted and language-specific, so similar NP+infinitive strings can instead be control, perception or small-clause constructions.
The main translation risk is copying Latin AcI directly as English NP-to-infinitive everywhere. Because the NP occupies object-like syntax, a model can assign it an unwanted matrix semantic role. The lower predicate must therefore be reconstructed explicitly before target phrasing.
A practical diagnostic is to choose English that-clause when ECM would be unnatural. For example, reported Latin statements often translate best with finite English clauses. Once matrix and lower roles are secure, choose the target’s natural ECM, that-clause or passive-raising construction.
Tense in Infinitives
Pronoun case should be checked only after lower semantic roles are clear. Infinitival complements can express simultaneity, anteriority or posteriority through simple/perfect/progressive forms and matrix context. ECM is lexically restricted and language-specific, so similar NP+infinitive strings can instead be control, perception or small-clause constructions.
The main translation risk is treating infinitive as timeless or always future. Because the NP occupies object-like syntax, a model can assign it an unwanted matrix semantic role. The lower predicate must therefore be reconstructed explicitly before target phrasing.
A practical diagnostic is to map lower event time relative to matrix. For example, to be ill can be simultaneous; to have left is anterior. Once matrix and lower roles are secure, choose the target’s natural ECM, that-clause or passive-raising construction.
Perfect Infinitive
The first task is to separate case licensing from semantic selection. Perfect infinitives mark lower-event anteriority relative to the relevant reference point. ECM is lexically restricted and language-specific, so similar NP+infinitive strings can instead be control, perception or small-clause constructions.
The main translation risk is translating have + participle as matrix perfect. Because the NP occupies object-like syntax, a model can assign it an unwanted matrix semantic role. The lower predicate must therefore be reconstructed explicitly before target phrasing.
A practical diagnostic is to keep perfect inside the embedded proposition. For example, I believe him to have left = I believe that he left earlier/has left. Once matrix and lower roles are secure, choose the target’s natural ECM, that-clause or passive-raising construction.
Progressive Infinitive
This construction requires a matrix frame and a lower infinitival frame. Progressive infinitives express an ongoing embedded event. ECM is lexically restricted and language-specific, so similar NP+infinitive strings can instead be control, perception or small-clause constructions.
The main translation risk is dropping aspect when restructuring into a finite clause. Because the NP occupies object-like syntax, a model can assign it an unwanted matrix semantic role. The lower predicate must therefore be reconstructed explicitly before target phrasing.
A practical diagnostic is to preserve ongoingness. For example, I believe him to be working = I believe he is working. Once matrix and lower roles are secure, choose the target’s natural ECM, that-clause or passive-raising construction.
Passive Infinitive
A precise translation identifies whether the NP is a true matrix object or a raised embedded subject. The lower infinitive can itself be passive, creating separate matrix case and embedded voice layers. ECM is lexically restricted and language-specific, so similar NP+infinitive strings can instead be control, perception or small-clause constructions.
The main translation risk is treating the ECM NP as agent of the passive lower event. Because the NP occupies object-like syntax, a model can assign it an unwanted matrix semantic role. The lower predicate must therefore be reconstructed explicitly before target phrasing.
A practical diagnostic is to identify lower passive roles. For example, I expect him to be examined = him is patient of examine. Once matrix and lower roles are secure, choose the target’s natural ECM, that-clause or passive-raising construction.
Negation Scope
The target may replace ECM with a finite that-clause while preserving one referent. Negation can apply to the matrix attitude or to the embedded infinitival proposition. ECM is lexically restricted and language-specific, so similar NP+infinitive strings can instead be control, perception or small-clause constructions.
The main translation risk is moving not across the ECM boundary. Because the NP occupies object-like syntax, a model can assign it an unwanted matrix semantic role. The lower predicate must therefore be reconstructed explicitly before target phrasing.
A practical diagnostic is to bracket NOT[believe P] vs believe[NOT P]. For example, I don’t believe him to be guilty differs from I believe him not to be guilty. Once matrix and lower roles are secure, choose the target’s natural ECM, that-clause or passive-raising construction.
Raising vs Small Clauses
Pronoun case should be checked only after lower semantic roles are clear. Some verbs license NP + adjective/noun/participle small clauses without to be, related in meaning to ECM predication. ECM is lexically restricted and language-specific, so similar NP+infinitive strings can instead be control, perception or small-clause constructions.
The main translation risk is inserting or deleting copular meaning incorrectly. Because the NP occupies object-like syntax, a model can assign it an unwanted matrix semantic role. The lower predicate must therefore be reconstructed explicitly before target phrasing.
A practical diagnostic is to compare I consider him intelligent / to be intelligent. For example, target may choose a small clause or infinitive depending style. Once matrix and lower roles are secure, choose the target’s natural ECM, that-clause or passive-raising construction.
Register
The first task is to separate case licensing from semantic selection. ECM forms such as believe him to be can sound formal compared with that-clauses in modern English. ECM is lexically restricted and language-specific, so similar NP+infinitive strings can instead be control, perception or small-clause constructions.
The main translation risk is preserving a formal NP-to-infinitive structure in casual dialogue unnecessarily. Because the NP occupies object-like syntax, a model can assign it an unwanted matrix semantic role. The lower predicate must therefore be reconstructed explicitly before target phrasing.
A practical diagnostic is to match target genre. For example, I think he’s honest is often more natural than I believe him to be honest in conversation. Once matrix and lower roles are secure, choose the target’s natural ECM, that-clause or passive-raising construction.
Translation into English
This construction requires a matrix frame and a lower infinitival frame. Source AcI/ECM-like structures may map to English ECM, finite that-clauses, perception complements or passive raising depending matrix verb and register. ECM is lexically restricted and language-specific, so similar NP+infinitive strings can instead be control, perception or small-clause constructions.
The main translation risk is forcing NP-to-infinitive because the source is nonfinite. Because the NP occupies object-like syntax, a model can assign it an unwanted matrix semantic role. The lower predicate must therefore be reconstructed explicitly before target phrasing.
A practical diagnostic is to choose the target construction lexically licensed by the English matrix predicate. For example, Latin indirect statement often becomes that + finite clause. Once matrix and lower roles are secure, choose the target’s natural ECM, that-clause or passive-raising construction.
Translation into Case-Rich Targets
A precise translation identifies whether the NP is a true matrix object or a raised embedded subject. Targets with visible accusative/nominative distinctions may require explicit case choices for embedded subjects. ECM is lexically restricted and language-specific, so similar NP+infinitive strings can instead be control, perception or small-clause constructions.
The main translation risk is using semantic subjecthood to choose nominative even when target ECM requires accusative. Because the NP occupies object-like syntax, a model can assign it an unwanted matrix semantic role. The lower predicate must therefore be reconstructed explicitly before target phrasing.
A practical diagnostic is to apply target complement syntax after role mapping. For example, embedded subject can be accusative despite subject semantics. Once matrix and lower roles are secure, choose the target’s natural ECM, that-clause or passive-raising construction.
Legal/Administrative Reports
The target may replace ECM with a finite that-clause while preserving one referent. Formal reports often contain believe/consider/deem/expect structures where role errors can change who is judged or expected to act. ECM is lexically restricted and language-specific, so similar NP+infinitive strings can instead be control, perception or small-clause constructions.
The main translation risk is treating ECM subject as ordinary matrix object and severing lower predicate. Because the NP occupies object-like syntax, a model can assign it an unwanted matrix semantic role. The lower predicate must therefore be reconstructed explicitly before target phrasing.
A practical diagnostic is to write the embedded proposition explicitly before drafting. For example, the person deemed to be responsible is the one predicated responsible. Once matrix and lower roles are secure, choose the target’s natural ECM, that-clause or passive-raising construction.
AI Object-Control Confusion
Pronoun case should be checked only after lower semantic roles are clear. Models can paraphrase ECM verbs with persuade/order-type meanings because the NP looks like a matrix object. ECM is lexically restricted and language-specific, so similar NP+infinitive strings can instead be control, perception or small-clause constructions.
The main translation risk is adding causation/communication toward the NP. Because the NP occupies object-like syntax, a model can assign it an unwanted matrix semantic role. The lower predicate must therefore be reconstructed explicitly before target phrasing.
A practical diagnostic is to test expletive possibility and semantic selection. For example, believe him to be does not mean persuade him. Once matrix and lower roles are secure, choose the target’s natural ECM, that-clause or passive-raising construction.
AI Case Normalisation
The first task is to separate case licensing from semantic selection. Models can change him to he in formal rewrites because they focus on embedded subject semantics. ECM is lexically restricted and language-specific, so similar NP+infinitive strings can instead be control, perception or small-clause constructions.
The main translation risk is violating target ECM case. Because the NP occupies object-like syntax, a model can assign it an unwanted matrix semantic role. The lower predicate must therefore be reconstructed explicitly before target phrasing.
A practical diagnostic is to check surface target case after semantic analysis. For example, English pronouns must remain objective in active ECM. Once matrix and lower roles are secure, choose the target’s natural ECM, that-clause or passive-raising construction.
AI Subject Loss
This construction requires a matrix frame and a lower infinitival frame. When restructuring ECM to a finite that-clause, AI can lose or duplicate the embedded subject. ECM is lexically restricted and language-specific, so similar NP+infinitive strings can instead be control, perception or small-clause constructions.
The main translation risk is changing participant count. Because the NP occupies object-like syntax, a model can assign it an unwanted matrix semantic role. The lower predicate must therefore be reconstructed explicitly before target phrasing.
A practical diagnostic is to coindex NP through the transformation. For example, him → he should be one referent, not two or zero. Once matrix and lower roles are secure, choose the target’s natural ECM, that-clause or passive-raising construction.
Back-Translation ECM Check
A precise translation identifies whether the NP is a true matrix object or a raised embedded subject. A final audit should recover matrix predicate, embedded subject, embedded predicate, case source and control/raising status. ECM is lexically restricted and language-specific, so similar NP+infinitive strings can instead be control, perception or small-clause constructions.
The main translation risk is checking only that all nouns remain. Because the NP occupies object-like syntax, a model can assign it an unwanted matrix semantic role. The lower predicate must therefore be reconstructed explicitly before target phrasing.
A practical diagnostic is to write MATRIX V + ECM NP + LOWER PREDICATE + CASE + SEMANTIC ROLE. For example, translation succeeds when the NP remains subject of the lower event and is not invented as a matrix semantic object. Once matrix and lower roles are secure, choose the target’s natural ECM, that-clause or passive-raising construction.
Worked Examples
Worked Example 1: Believe ECM
Source problem: Source/English: ‘I believe him to be honest.’
Diagnosis: Him receives objective case under believe but is semantic subject of be honest.
Target strategy: A target may keep ECM or use ‘I believe that he is honest.’
Verification: Do not paraphrase as ‘I believe him’ plus unrelated honesty.
Worked Example 2: Object Control Contrast
Source problem: Compare ‘I persuaded him to leave.’
Diagnosis: Persuade semantically selects him as persuadee; him also controls leave.
Target strategy: Do not analyse this as ECM.
Verification: The matrix verb’s relation to him is part of the meaning.
Worked Example 3: Expletive There
Source problem: Source: ‘I believe there to be a problem.’
Diagnosis: There has no referent and supports raising/ECM analysis.
Target strategy: Target can use ‘I believe there is a problem.’
Verification: Do not treat there as an object/location.
Worked Example 4: Passive Raising
Source problem: Source: ‘John is believed to be honest.’
Diagnosis: John is matrix nominative through passive but remains semantic subject of be honest.
Target strategy: Translate as ordinary passive raising or a finite report.
Verification: Do not make John semantic patient of honesty/belief.
Practical Diagnostic Workflow
Create an ECM CARD: MATRIX VERB; MATRIX SUBJECT; ECM NP; SURFACE CASE; LOWER INFINITIVE; LOWER NP ROLE; EXPLETIVE POSSIBLE?; IDIOM CHUNK POSSIBLE?; PASSIVE RAISING?; TENSE/ASPECT OF INFINITIVE. This differentiates raising from control and ordinary objects.
Run the finite-paraphrase test. Replace NP+to-infinitive with that + nominative subject + finite predicate. If the meaning remains close and the matrix verb does not independently act on/select the NP, ECM is plausible.
Verification Method
Back-read the target and identify one embedded subject plus its lower predicate. Check that the matrix verb contributes belief/expectation/judgment rather than an unintended action on the NP. Then verify target pronoun case and embedded tense/aspect.
Recovery Method
If ECM became object control, rewrite the embedded proposition as a finite clause and restore the intended matrix attitude. If pronoun case was normalised incorrectly, reapply target ECM syntax. If restructuring duplicated the NP, coindex and delete the extra referent.
Quality-Assurance Checklist
- Identify matrix predicate.
- Identify embedded infinitival predicate.
- Identify ECM NP as lower subject.
- Separate case source from semantic role.
- Distinguish ECM from object control.
- Use expletive diagnostics.
- Use idiom-chunk diagnostics cautiously.
- Check finite that-clause paraphrase.
- Check pronoun case.
- Check perfect/progressive/passive infinitives.
- Check negation scope.
- Check passive raising/NCI counterparts.
- Treat Latin AcI and English ECM separately.
- Audit AI control confusion.
- Audit AI case normalisation and subject duplication/loss.
Frequently Asked Questions
What is Exceptional Case Marking?
A construction where an embedded nonfinite subject receives accusative/object-like case from a higher predicate.
Why is him accusative in ‘I believe him to be honest’?
Because English active ECM licenses objective case on the embedded subject even though him is semantically the subject of be honest.
Is ECM the same as object control?
No. Object-control verbs semantically select the object/controller; ECM/raising predicates need not assign the NP an independent matrix semantic role.
What is accusativus cum infinitivo?
The traditional Latin/European label ‘accusative with infinitive’ for related constructions where an accusative NP functions as the infinitive’s subject.
Can expletive there appear in ECM?
Yes in English with suitable predicates, e.g. ‘I believe there to be a problem,’ a classic raising diagnostic.
What is the passive counterpart?
Forms such as ‘John is believed to be honest’ are traditionally related to nominative-with-infinitive or subject-to-subject raising.
Does Latin AcI translate as English ECM?
Sometimes, but often ordinary English that-clauses are more natural because Latin AcI is far more productive in indirect statement.
Why does AI mistranslate ECM?
The embedded subject looks like a matrix object, so models may assign it object semantics or confuse raising with persuasion/control.
Where This Fits in the eduKate Translation Architecture
Route finite/nonfinite complement architecture to Complement Clauses; argument frames to Verb Valency and Argument Structure; passive raising to Passive Voice, Agency and Attribution; case licensing to Grammatical Case.
Final Principle
ECM makes one noun phrase look upward for case and downward for meaning. Preserve both relations. The NP may be object-like morphologically, but its real event role lives inside the infinitive.