PSLE English Learning Guide · Guide 38 · Sentence transformation workshop
Return to the PSLE Learning Guide · Synthesis and Transformation overview · Previous: Reported Speech
“The teacher checked the pupils.” “The pupils checked the teacher.”
Both sentences use the same main words. They describe different events. Moving words is not enough: the roles must survive the move.
Now compare “The teacher checked the forms” with “The forms were checked by the teacher.” The starting point has changed, but the teacher still performs the checking and the forms still receive it. That is the central promise of an active-to-passive transformation.
Identify the action, its performer and its receiver. Then rebuild the sentence while keeping time, completion, quantity, negatives and conditions intact. Voice changes what the sentence foregrounds. It should not accidentally create a new event.
The 2026 SEAB English format includes Synthesis / Transformation in Paper 2 Booklet B. This article develops one language mechanism within the wider work introduced in Guide 7. Its original exercises are learning material, not a prediction of official questions or an official answer scheme.
Choose the part of the transformation that needs repair
If the wrong person performs the action after rewriting, begin with role mapping. If a sentence loses time or completion, use the verb-chain workshop. If every sentence containing “was” is labelled passive, use the state-versus-action section. If a report invents an actor, go to unknown performers. The final workshop combines these decisions in unfamiliar sentences.
Map the roles · Rebuild the verb chain · Pronoun forms · Negatives and modals · Two objects · Worked case · Independent practice · Teaching guide
Map roles before moving nouns
Take “Aisha carried the display board into the classroom.” The action is carrying. Aisha performs it. The display board receives it. The classroom is a destination; it is not the thing being carried.
The passive version begins with the receiver: “The display board was carried into the classroom by Aisha.” You can also place the agent earlier: “The display board was carried by Aisha into the classroom.” Both preserve the basic event, although one order may sound more natural in a particular paragraph.
Use three temporary labels: performer → action → receiver. Do not use “first noun → middle word → last noun”. A sentence can contain names, places, times and objects in many positions.
The British Council’s active/passive reference describes the common passive with a form of be and a past participle, and the use of by when the performer is included. The role maps and examples here apply that structure to original classroom tasks.
Subject and performer are not always the same thing
In “Aisha carried the board”, Aisha is both grammatical subject and performer. In “The board was carried by Aisha”, the board is the grammatical subject, but Aisha remains the performer.
This explains why “find the subject by asking who did it” can fail in a passive sentence. The subject is the phrase the clause is organised around, not always the person doing an action.
For this workshop, receiver means the person or thing affected by the action. It does not necessarily receive a physical object. A plan can be approved, a question can be answered and a room can be checked.
Do not turn the terminology into a second assignment. A pupil can say “the teacher does the checking; the forms get checked” and still have a useful role map. The labels should make the sentence easier to understand.
Make the basic move in four decisions
Source: The pupils painted the sign yesterday.
First identify the receiver: the sign. Second identify the verb information: simple past, completed painting in the stated past context. Third select the passive chain: singular receiver gives was painted. Fourth retain the performer and time: by the pupils yesterday.
Result: The sign was painted by the pupils yesterday.
Now reverse it. “The sign was painted by the pupils yesterday” returns to “The pupils painted the sign yesterday.” The reverse check is valuable because it reveals whether the new sentence still contains the same event.
Rebuild the whole verb chain, not only the main verb
The passive is not formed by inserting was into every sentence. The original verb phrase may express a present routine, a completed past event, an ongoing action, an earlier completion or a future plan.
Read these original pairs aloud. Listen for what remains stable:
Routine: The caretaker checks the gate every morning. → The gate is checked by the caretaker every morning.
Past event: The caretaker checked the gate yesterday. → The gate was checked by the caretaker yesterday.
Ongoing now: The caretaker is checking the gate. → The gate is being checked by the caretaker.
Ongoing then: The caretaker was checking the gate when we arrived. → The gate was being checked by the caretaker when we arrived.
Completed with present relevance: The caretaker has checked the gate. → The gate has been checked by the caretaker.
Completed before another past point: The caretaker had checked the gate before the visitors arrived. → The gate had been checked by the caretaker before the visitors arrived.
Future: The caretaker will check the gate tomorrow. → The gate will be checked by the caretaker tomorrow.
These pairs are not seven unrelated formulas. Each keeps the original time and aspect while adding the passive structure. For a reference table of passive forms, see British Council: Active and passive voice.
Been and being do different work
“The forms have been checked” presents the checking as completed relative to the current viewpoint. “The forms are being checked” presents it as in progress. Replacing one with the other changes the message.
A useful question is: “Has the action been completed, or are we looking at it while it is happening?” Then inspect the original auxiliary. Has/have/had and am/is/are/was/were do not carry the same structure.
Compare “The pupils have packed the models” and “The pupils are packing the models.” In the first, the models have been packed. In the second, they are being packed. The passive receiver is identical; the action state is not.
Do not decide from the word models alone. The complete verb phrase controls the difference.
Agreement follows the new subject
“The pupils have checked the box” becomes “The box has been checked by the pupils.” The old subject is plural, but the new subject is singular. Have changes to has because agreement follows the new subject while present-perfect meaning remains.
“The teacher has checked the boxes” becomes “The boxes have been checked by the teacher.” Now the change goes in the other direction.
Likewise, “She is moving the chairs” becomes “The chairs are being moved by her.” The tense and ongoing aspect remain present continuous. The auxiliary agrees with chairs.
This is not random verb swapping. Keep the original time and aspect, then give the new subject the correct agreement. If subject identification is the main obstacle, return to the existing Subject–Verb Agreement guide.
The past participle may not look like the simple past
Regular verbs can hide this distinction because their past forms look alike: checked, painted, opened. Irregular verbs make it visible.
Write: The captain wrote the note. → The note was written by the captain.
Choose: The class chose the design. → The design was chosen by the class.
Take: The teacher took the photographs. → The photographs were taken by the teacher.
Give: The librarian gave the instructions. → The instructions were given by the librarian.
“Was wrote”, “was chose” and “were took” do not supply the required participle. Practise the verb family separately when this is the only recurring error. A learner who maps every role correctly may need form retrieval, not another explanation of passive meaning.
Pronouns change form when their sentence job changes
“She thanked him” becomes “He was thanked by her.” The real people remain the same, but the pronoun forms follow their grammatical positions.
In these standard patterns, subject forms include I, he, she, we, they; object forms include me, him, her, us, them. After by, use the object form: by me, not by I.
Try this original pair: “They invited us.” → “We were invited by them.” Then reverse it. If the reverse becomes “We invited them”, the roles have been swapped.
Possessive words need a separate check. “She checked his project” becomes “His project was checked by her.” The project does not become hers merely because the sentence begins differently.
Negatives and modal verbs must survive
“The team did not submit the final design” becomes “The final design was not submitted by the team.” The negative belongs to submission. Do not change it to “The final design was submitted by another team”, which invents a different actor and a completed submission.
“The teacher may change the timetable” becomes “The timetable may be changed by the teacher.” Possibility remains possibility. “The timetable will be changed” is stronger and not equivalent.
“Visitors must not touch the display” becomes “The display must not be touched by visitors.” The prohibition remains. “The display need not be touched” says touching is unnecessary, not forbidden.
For a modal passive, keep the modal and use be + past participle: can be moved, should be checked, must be returned. The modal itself does not acquire an -s ending to agree with a singular subject.
Keep the details that limit the action
“The helper counted only the blue tokens before lunch.” A suitable passive is “Only the blue tokens were counted by the helper before lunch.” Keep the colour restriction and the time boundary.
“Only the helper counted the blue tokens” limits the performer instead. Its passive is “The blue tokens were counted only by the helper.” The position of only controls what is excluded.
Likewise, before cannot become after, some cannot become all, and without permission cannot disappear because the rest of the sentence is long.
During practice, underline one scope word and one time or condition phrase before transforming. Then locate them in the answer. This creates a small, visible check against meaning loss.
By identifies the performer; with can identify the tool
“The caretaker secured the notice with two clips.” In the passive: “The notice was secured by the caretaker with two clips.” The caretaker performs the action; the clips are the instrument.
Do not rewrite this as “The caretaker was secured by the notice.” That is not a grammar variation; it is another event. Nor should “with two clips” become “by two pupils”. Similar-looking phrases can carry different kinds of information.
Sometimes a non-human cause appears after by: “The sign was damaged by the wind.” That does not make the wind a person. The simplified label performer is a learning aid, not a claim that all actions require a human agent.
Read the meaning of each phrase rather than memorising “every by-phrase is a person” or “every with-phrase is a tool”. Context remains necessary.
Two-object sentences offer more than one possible starting point
“The librarian gave Aisha two bookmarks.” Aisha receives the bookmarks, and the bookmarks are the objects given. English allows two common passive versions:
Aisha was given two bookmarks by the librarian.
Two bookmarks were given to Aisha by the librarian.
The starting words of a transformation task may select one version. If the task begins “Two bookmarks…”, do not answer with “Aisha…”, even though that version is grammatical.
Notice agreement: Aisha was, but two bookmarks were. Notice the preposition in the second form: to Aisha. Do not assume every verb allows both structures in the same way.
For example, “The guide explained the rule to us” can become “The rule was explained to us by the guide.” “We were explained the rule” is not the standard counterpart. The verb’s pattern matters as much as the number of nouns.
Not every verb can take this passive transformation
“The visitors arrived early” contains no direct object receiving arrived. “Early was arrived by the visitors” does not make sense. Early describes time, not a receiver.
Similarly, “The accident happened yesterday” is not transformed into “The accident was happened yesterday”. In these uses, arrive and happen do not follow the ordinary transitive active-to-passive pattern.
For a beginner, first choose a sentence with a clear action and object: “The visitors signed the register.” Then the register can become the passive subject.
A method is stronger when it includes a stop condition. If you cannot identify a suitable object and a natural passive use of the verb, do not force the transformation merely because the worksheet has been about passive voice.
A form of be does not prove a sentence is passive
“The door was heavy” contains was but no passive action. Heavy describes the door. “The door was closing” is progressive active: the door was in the process of closing.
“The door was closed by the caretaker” clearly reports a passive action. “The door was closed” can describe its state or be understood as an action report depending on context. Do not invent a single interpretation when the sentence alone permits both.
When practising transformation, choose contexts that make the intended event clear. “The caretaker closed the door at 4 pm” supplies an actor, action and time. It is a better teaching item than a fragment whose status is uncertain.
The distinction matters in editing. A pupil should not rewrite every sentence with was simply because passive voice has become the current lesson.
Omitting an actor can be natural, but inventing one is not
“Someone moved the display overnight” can become “The display was moved overnight.” The passive does not identify the mover because the source does not.
When reversing “The display was moved overnight”, write “Someone moved the display overnight” if the task requires an active sentence and supplies no actor. Do not select the caretaker simply because caretakers often move furniture.
When the source names an actor and the task requires preserving all information, retain that actor. “The display was moved” loses information from “Aisha moved the display”. An ordinary paragraph might omit Aisha when the context already identifies her, but a transformation exercise may require the explicit detail.
Distinguish “good writing in context” from “a faithful answer to this particular task”. Those judgments often align, but they are not identical.
Worked case: The class photograph display
The following scenario and all quantities are fictional. No real event or school record is being described.
On Monday, the class selected eight photographs for a display. Aisha has printed the captions. Ben is arranging the photographs on the table. The teacher will check the finished layout before the class hangs it. The pupils must not attach anything to the wall without permission.
The task is to write a progress report beginning each sentence with the affected object or activity rather than the person. The point is not to make the report grander. It is to organise the information around the display materials.
One possible report: Eight photographs were selected for the display by the class on Monday. The captions have been printed by Aisha. The photographs are being arranged on the table by Ben. The finished layout will be checked by the teacher before it is hung by the class. Nothing must be attached to the wall by the pupils without permission.
This version is deliberately explicit so that every original role can be checked. In ordinary prose, repeated agents might be shortened when the reader already knows them. In this exercise, keeping them makes the comparison inspectable.
Check the report by reconstructing the original
Ask what has already happened. Selection and caption printing are complete. Arrangement is ongoing. Checking is future. Hanging follows the check. Attaching without permission remains prohibited.
Now inspect the quantity: eight photographs, not all the photographs in the class collection. Inspect the authorship of the captions: Aisha printed them; the source does not say she wrote their wording.
Reverse each passive sentence. “The photographs are being arranged by Ben” becomes “Ben is arranging the photographs”. If your reverse says “Ben arranged the photographs”, ongoing work has silently become completed work.
The report’s grammatical focus changed, but its information should still reconstruct the same progress state.
Repair clinic: Find the exact loss
Source: She has written the instructions.
Faulty: The instructions were wrote by she.
Repair: The instructions have been written by her. Preserve present perfect, use the participle and change the pronoun case.
Source: The pupils are moving the chairs.
Faulty: The chairs have been moved by the pupils.
Repair: The chairs are being moved by the pupils. The faulty version claims completion.
Source: The teacher may approve the plan.
Faulty: The plan must be approved by the teacher.
Repair: The plan may be approved by the teacher. Possibility is not obligation.
Source: Only Sara checked the final page.
Faulty: Only the final page was checked by Sara.
Repair: The final page was checked only by Sara. The restriction originally applied to the checker, not the set of pages.
Source: The guide explained the route to us.
Faulty: We were explained the route.
Repair: The route was explained to us by the guide. Keep the verb’s object pattern.
Source: The train arrived at noon.
Faulty: Noon was arrived by the train.
Repair: Keep the active sentence. There is no suitable object for this passive conversion.
Independent workshop: Twelve transformations
Keep every named performer, quantity, time and condition. Use the supplied beginning. The source sentences provide the intended tense; do not infer a different one.
- The librarian checks the return tray every afternoon. Begin: The return tray…
- Two pupils carried the model into the hall yesterday. Begin: The model…
- Sara is counting the blue tokens. Begin: The blue tokens…
- The teacher has chosen three drawings. Begin: Three drawings…
- The class had completed the banner before the visitors arrived. Begin: The banner…
- The organiser will send the message tomorrow. Begin: The message…
- You must not fold the map. Begin: The map…
- She thanked them after the rehearsal. Begin: They…
- The helper gave Noor a numbered card. Begin: Noor…
- The helper gave Noor a numbered card. Begin: A numbered card…
- The rule was explained to the pupils by Ms Lee. Begin: Ms Lee…
- The captain did not collect the last envelope. Begin: The last envelope…
Answers and checks
1. The return tray is checked by the librarian every afternoon. Routine present; singular tray.
2. The model was carried into the hall by two pupils yesterday. Keep destination, quantity and past time.
3. The blue tokens are being counted by Sara. The counting remains in progress.
4. Three drawings have been chosen by the teacher. Plural receiver changes has to have; chosen is the participle.
5. The banner had been completed by the class before the visitors arrived. Earlier completion remains earlier.
6. The message will be sent by the organiser tomorrow. Future remains future.
7. The map must not be folded by you. This explicit agent preserves the exercise’s instruction. In ordinary advice, “The map must not be folded” may be sufficient when the reader is understood.
8. They were thanked by her after the rehearsal. Roles remain, pronoun forms change.
9. Noor was given a numbered card by the helper. The recipient becomes subject.
10. A numbered card was given to Noor by the helper. The object given becomes subject.
11. Ms Lee explained the rule to the pupils. Preserve the person receiving the explanation.
12. The last envelope was not collected by the captain. Keep the negative; do not claim someone else collected it.
Three sentences you should not force into one pattern
“The meeting ended at noon.” In this use, there is no direct object. Do not produce “Noon was ended by the meeting”.
“The room was quiet.” This describes a state, not a passive action. No unnamed person needs to be invented.
“The window was broken.” Without more context, it may describe a state or an action with an omitted cause. A careful explanation recognises that uncertainty rather than naming a culprit.
These stop tests are part of mastery. Reliable transformation includes knowing when the requested mechanical move is not justified.
Transfer the skill into writing without overusing it
An active sentence is often direct: “We counted the books.” A passive sentence may be useful when the books are already the paragraph’s focus: “The books were counted and placed in labelled boxes.” Neither voice is automatically more intelligent or formal.
For a report, the passive can keep attention on a procedure or object when the performer is already known. For a narrative, an active sentence may make the character’s choice clearer. Choose according to what the reader needs next.
Do not hide responsibility accidentally. If the important fact is that the narrator damaged a model, “The model was damaged” removes the actor from view. That may be evasive in a personal account even though it is grammatical.
Grammar gives choices. Good writing chooses the one that preserves truth and helps the paragraph.
Parent and tutor guide: Separate role errors from verb errors
First ask the learner to explain the original event without grammar labels. Who does what? What is affected? When does it happen? If those answers are wrong, begin with reading rather than a passive formula.
Next transform a simple sentence while retaining the names. Add pronouns only after the roles are stable. Introduce ongoing and completed forms as contrasting pairs rather than as a long table to memorise.
When a learner writes “was wrote”, the role map may be correct. Practise the participle. When the learner writes “the teacher was checked by the forms”, the verb form may be grammatical but the roles are wrong. The repairs should differ.
For a later return, use a fresh topic and include one sentence that should not be passivised. Record whether the learner can transform, reverse-check and decline an invalid conversion independently. A copied correct answer is useful practice, but not the same evidence of control.
The active/passive check
Find the action and its receiver. Keep the performer. Preserve the tense and action state. Build the correct passive verb chain. Adjust agreement and pronoun case. Keep negatives, quantities and conditions. Reverse the sentence to see whether the same event returns.
A successful transformation changes the sentence’s focus without changing its history.
Continue through Batch 10
Guide 37: Reported Speech changes the reporting viewpoint. Next, Guide 39: Although and Despite changes the contrast structure, and Guide 40: Too, Enough and So…That changes the expression of degree and result.
Return to the PSLE Learning Guide · Synthesis and Transformation overview
Sources and teaching boundaries
Assessment: SEAB’s 2026 PSLE formats and the linked English Language 0001 syllabus. These establish the assessment context, not a guaranteed list of transformation constructions.
Language reference: British Council: Active and passive voice. Source checked 5 September 2026. The original role maps, progress report, repair clinic and exercises are teaching applications, not quotations from that reference.
Practice boundaries: These are original examples, not official PSLE items or an official acceptance list. Word order can vary when meaning remains clear and task instructions are met. Follow the exact supplied beginning, retained details and course requirements. No grade or fixed improvement timeline is promised.