Series route: This guide belongs to the complete PSLE Learner’s Guide volume directory. The original PSLE Learning Guide supplies the wider English, Mathematics and Science route, while PSLE English provide verified subject-specific continuation.
Find your route through this guide
This volume solves one precise learner problem: the learner sees one near who and automatically chooses a singular verb, even when who refers to a plural group such as pupils, books or methods. The aim is not to memorise a slogan. It is to understand the mechanism well enough to recognise the idea when the wording, numbers, diagram or context changes. A Primary 6 learner should be able to explain the decision, perform it under time pressure, and detect a tempting answer that only looks familiar.
- Understand the mechanism before memorising a form.
- Study the worked examples and compare near-misses.
- Repair common misconceptions with targeted tests.
- Complete graded independent practice before reading the answers.
- Use delayed transfer and examination control to make the skill durable.
- Use the parent and tutor notes only after the learner has attempted the work.
The problem beneath the mistake
The sentence “Mina is one of the pupils who are ready” contains two different subject decisions. Mina is the singular subject of the main clause, so Mina is one. Inside who are ready, however, who refers to pupils: the pupils are ready, and Mina is one member of that plural group.
The word one is therefore not automatically the controller of every later verb. The learner must open the relative clause and ask who or what the relative pronoun represents. Replacing who with its antecedent often makes the agreement visible: “the pupils are ready.”
The pattern changes with the only one. In “Mina is the only one who is ready,” the relative clause identifies Mina as the single ready person. Here who refers to the singular one, so is is appropriate.
This contrast is useful because both sentences contain one, who and a form of be. Surface matching cannot solve them. Meaning and clause structure determine which noun supplies number to the relative-clause verb.
A relative clause adds information about a noun phrase. Words such as who, which and that can introduce it. The relative pronoun carries the role of its antecedent inside that clause, so agreement depends on tracing the reference accurately.
The main verb and the relative-clause verb must be checked separately. “One of the machines is faulty” has singular is in the main clause. “One of the machines that are faulty has been removed” can have plural are inside the relative clause because that refers to machines.
Punctuation can change meaning. A defining relative clause identifies the group being discussed, while a non-defining clause adds information. The core agreement test remains the same: state the full noun that the relative pronoun stands for and read the clause with that noun restored.
Context may sometimes make a different reference possible, but a school editing question normally supplies a meaning that makes the intended antecedent clear. Do not defend a strained reading merely to preserve a chosen verb. Select the reading that makes the whole sentence coherent.
The safest routine is not “look left one word.” It is “find the clause, replace who with the intended noun, choose the verb, then reread the entire sentence.” This takes seconds and works beyond memorised examples.
A final precision point matters: one of those pupils who work hard means several pupils work hard and the person is one of them. The only one of those pupils who works hard means exactly one person in that group works hard. The determiner only changes the size of the identified set.
Pronoun reference and subject–verb agreement are connected here. If the antecedent is wrong, the verb may look wrong even when its form is grammatical for the mistaken noun. Repair reference before editing the verb.
In composition, the structure can be useful for grouping a character with others or distinguishing a unique person. Use it only when the group relation is genuinely needed; a shorter sentence is better than a complicated clause whose reference is unclear.
Core decision: In “one of the pupils who are ready,” who normally refers to pupils, so the relative-clause verb is plural; in “the only one who is ready,” who refers to the singular one, so the verb is singular.
A useful rule has three parts: a trigger, an operation and a check. The trigger tells you when the rule applies. The operation tells you what to do. The check tells you whether the result still matches the meaning of the question. Learners who remember only the operation often apply it in the wrong place; learners who remember only an example often freeze when the surface details change.
Mechanism: why the rule works
1. Bracket the relative clause
Mark the words beginning with who, which or that and ending where the description finishes.
Diagnostic question: Which verb belongs inside that clause? Reliable response: Do not mix it with the main verb.
2. Find the antecedent
Ask which earlier noun the relative pronoun represents.
Diagnostic question: Who are the people or things performing the clause action? Reliable response: Name the noun fully.
3. Restore the noun
Temporarily replace who with the antecedent.
Diagnostic question: Does “the pupils are ready” or “the one is ready” express the intended meaning? Reliable response: Use the restored clause.
4. Choose number
Match the relative-clause verb to the restored noun.
Diagnostic question: Is that noun singular or plural? Reliable response: Select is/are, has/have or works/work.
5. Check the main clause separately
Find the subject and verb outside the relative clause.
Diagnostic question: Does one control the main verb? Reliable response: Make a second agreement decision.
6. Reread for set meaning
Confirm whether the sentence names one member of a plural set or one unique member.
Diagnostic question: Does only change the identified set? Reliable response: State the meaning in plain words.
Worked examples: make the decision visible
Do not race through these examples. Before reading each explanation, name the evidence that matters and the information that does not. Then compare the correct route with the tempting route. That comparison is where the transferable learning sits.
Worked example 1: One member of a group
Task. Complete: “Lina is one of the runners who ___ every morning.”
Reasoning. Who refers to runners, a plural noun. The controlling idea is the antecedent of who inside the relative clause, not the number of the main-clause subject by itself. This prevents a learner from choosing an answer merely because one word, number or observation resembles a remembered example.
Answer. Lina is one of the runners who train every morning.
Independent check. Restore “the runners train”. A good check approaches the conclusion from a different direction. Repeating the same steps more slowly may repeat the same hidden assumption.
Worked example 2: Unique person
Task. Complete: “Lina is the only one who ___ every morning.”
Reasoning. Who refers to the only one. The controlling idea is the antecedent of who inside the relative clause, not the number of the main-clause subject by itself. This prevents a learner from choosing an answer merely because one word, number or observation resembles a remembered example.
Answer. Lina is the only one who trains every morning.
Independent check. Restore “the one trains”. A good check approaches the conclusion from a different direction. Repeating the same steps more slowly may repeat the same hidden assumption.
Worked example 3: Books
Task. Edit: “This is one of the books that explains the process clearly.”
Reasoning. The intended meaning is that the books in the set explain it. The controlling idea is the antecedent of who inside the relative clause, not the number of the main-clause subject by itself. This prevents a learner from choosing an answer merely because one word, number or observation resembles a remembered example.
Answer. This is one of the books that explain the process clearly.
Independent check. Replace that with books. A good check approaches the conclusion from a different direction. Repeating the same steps more slowly may repeat the same hidden assumption.
Worked example 4: Only book
Task. Complete: “This is the only book that ___ both methods.”
Reasoning. That refers to the singular only book. The controlling idea is the antecedent of who inside the relative clause, not the number of the main-clause subject by itself. This prevents a learner from choosing an answer merely because one word, number or observation resembles a remembered example.
Answer. This is the only book that explains both methods.
Independent check. Test “the book explains”. A good check approaches the conclusion from a different direction. Repeating the same steps more slowly may repeat the same hidden assumption.
Worked example 5: Main and relative verbs
Task. Complete: “One of the tools that ___ missing ___ on the table.”
Reasoning. Tools controls are inside the clause; one controls is outside it. The controlling idea is the antecedent of who inside the relative clause, not the number of the main-clause subject by itself. This prevents a learner from choosing an answer merely because one word, number or observation resembles a remembered example.
Answer. One of the tools that are missing is on the table.
Independent check. Label both clauses. A good check approaches the conclusion from a different direction. Repeating the same steps more slowly may repeat the same hidden assumption.
Worked example 6: People
Task. Edit: “Mei is one of those people who keeps promises.”
Reasoning. Who refers to people. The controlling idea is the antecedent of who inside the relative clause, not the number of the main-clause subject by itself. This prevents a learner from choosing an answer merely because one word, number or observation resembles a remembered example.
Answer. Mei is one of those people who keep promises.
Independent check. Read the group statement. A good check approaches the conclusion from a different direction. Repeating the same steps more slowly may repeat the same hidden assumption.
Worked example 7: Only participant
Task. Complete: “Arun is the only participant who ___ submitted both pages.”
Reasoning. The antecedent is singular participant. The controlling idea is the antecedent of who inside the relative clause, not the number of the main-clause subject by itself. This prevents a learner from choosing an answer merely because one word, number or observation resembles a remembered example.
Answer. Arun is the only participant who has submitted both pages.
Independent check. Replace who with Arun. A good check approaches the conclusion from a different direction. Repeating the same steps more slowly may repeat the same hidden assumption.
Worked example 8: Ambiguous meaning
Task. Compare “one of the students who were selected” with “the one student who was selected.”
Reasoning. The first places one person in a selected group; the second says exactly one student was selected. The controlling idea is the antecedent of who inside the relative clause, not the number of the main-clause subject by itself. This prevents a learner from choosing an answer merely because one word, number or observation resembles a remembered example.
Answer. Plural were belongs with students; singular was belongs with one student.
Independent check. Paraphrase each set. A good check approaches the conclusion from a different direction. Repeating the same steps more slowly may repeat the same hidden assumption.
Deepening lab: compare cases, conditions and limits
A method becomes independent when you can say where it applies, where it stops and which change would alter the conclusion. The cases below deliberately vary one structural feature at a time. For each case, pause before the analysis and predict whether the core rule remains available. Then name the exact condition that controls the decision. This is harder than repeating a worked solution, but it is also closer to what an unfamiliar examination item demands.
Deepening case 1: Have and has
Case. One of the teams that have qualified is travelling.
Analysis. Teams controls have; one controls is. Notice that the answer depends on the antecedent of who inside the relative clause, not the number of the main-clause subject by itself; changing a decorative detail would not be enough to change the reasoning.
Challenge. Label both subjects. State the conclusion in one precise sentence, then add one sentence that names the evidence or relationship that makes it valid.
Deepening case 2: Work and works
Case. She is one of the tutors who work nearby.
Analysis. The clause describes tutors as a group. Notice that the answer depends on the antecedent of who inside the relative clause, not the number of the main-clause subject by itself; changing a decorative detail would not be enough to change the reasoning.
Challenge. Change to the only tutor. State the conclusion in one precise sentence, then add one sentence that names the evidence or relationship that makes it valid.
Deepening case 3: Was and were
Case. He was one of the pupils who were absent.
Analysis. Pupils controls were despite singular he. Notice that the answer depends on the antecedent of who inside the relative clause, not the number of the main-clause subject by itself; changing a decorative detail would not be enough to change the reasoning.
Challenge. Restore the noun. State the conclusion in one precise sentence, then add one sentence that names the evidence or relationship that makes it valid.
Deepening case 4: Which
Case. This is one of the machines which require repair.
Analysis. Which refers to machines. Notice that the answer depends on the antecedent of who inside the relative clause, not the number of the main-clause subject by itself; changing a decorative detail would not be enough to change the reasoning.
Challenge. Make machine unique. State the conclusion in one precise sentence, then add one sentence that names the evidence or relationship that makes it valid.
Deepening case 5: That
Case. It is the only route that avoids the roadworks.
Analysis. That refers to singular route. Notice that the answer depends on the antecedent of who inside the relative clause, not the number of the main-clause subject by itself; changing a decorative detail would not be enough to change the reasoning.
Challenge. Remove only and reassess. State the conclusion in one precise sentence, then add one sentence that names the evidence or relationship that makes it valid.
Deepening case 6: Collective noun
Case. She is one of the team members who practise daily.
Analysis. Members is the plural antecedent, not team. Notice that the answer depends on the antecedent of who inside the relative clause, not the number of the main-clause subject by itself; changing a decorative detail would not be enough to change the reasoning.
Challenge. Replace the pronoun. State the conclusion in one precise sentence, then add one sentence that names the evidence or relationship that makes it valid.
Deepening case 7: Main verb first
Case. One of the answers is correct.
Analysis. One controls the main clause. Notice that the answer depends on the antecedent of who inside the relative clause, not the number of the main-clause subject by itself; changing a decorative detail would not be enough to change the reasoning.
Challenge. Add a relative clause about answers. State the conclusion in one precise sentence, then add one sentence that names the evidence or relationship that makes it valid.
Deepening case 8: Nested phrase
Case. One of the boxes of files that are damaged is upstairs.
Analysis. Meaning must decide whether boxes or files are damaged. Notice that the answer depends on the antecedent of who inside the relative clause, not the number of the main-clause subject by itself; changing a decorative detail would not be enough to change the reasoning.
Challenge. Rewrite to remove ambiguity. State the conclusion in one precise sentence, then add one sentence that names the evidence or relationship that makes it valid.
Deepening case 9: Non-defining clause
Case. The two pupils, who are ready, entered.
Analysis. Who refers to two pupils. Notice that the answer depends on the antecedent of who inside the relative clause, not the number of the main-clause subject by itself; changing a decorative detail would not be enough to change the reasoning.
Challenge. Explain the commas. State the conclusion in one precise sentence, then add one sentence that names the evidence or relationship that makes it valid.
Deepening case 10: Defining group
Case. The pupils who are ready may enter.
Analysis. The clause identifies a subset. Notice that the answer depends on the antecedent of who inside the relative clause, not the number of the main-clause subject by itself; changing a decorative detail would not be enough to change the reasoning.
Challenge. Change the subset to one pupil. State the conclusion in one precise sentence, then add one sentence that names the evidence or relationship that makes it valid.
Deepening case 11: Only one of them
Case. Only one of them is ready.
Analysis. No relative clause is present; one controls is. Notice that the answer depends on the antecedent of who inside the relative clause, not the number of the main-clause subject by itself; changing a decorative detail would not be enough to change the reasoning.
Challenge. Add who is ready. State the conclusion in one precise sentence, then add one sentence that names the evidence or relationship that makes it valid.
Deepening case 12: One of them
Case. One of them is ready.
Analysis. The phrase does not claim the others are ready. Notice that the answer depends on the antecedent of who inside the relative clause, not the number of the main-clause subject by itself; changing a decorative detail would not be enough to change the reasoning.
Challenge. Contrast with one of those who are ready. State the conclusion in one precise sentence, then add one sentence that names the evidence or relationship that makes it valid.
Deepening case 13: Meaning over proximity
Case. The nearest word may be one while the antecedent is pupils.
Analysis. Agreement follows reference, not a mechanical nearest-noun rule. Notice that the answer depends on the antecedent of who inside the relative clause, not the number of the main-clause subject by itself; changing a decorative detail would not be enough to change the reasoning.
Challenge. Mark the antecedent arrow. State the conclusion in one precise sentence, then add one sentence that names the evidence or relationship that makes it valid.
Deepening case 14: Composition
Case. Aisha is one of the friends who support me.
Analysis. The structure links Aisha to a supportive group. Notice that the answer depends on the antecedent of who inside the relative clause, not the number of the main-clause subject by itself; changing a decorative detail would not be enough to change the reasoning.
Challenge. Write a unique-person version. State the conclusion in one precise sentence, then add one sentence that names the evidence or relationship that makes it valid.
Deepening case 15: Situational writing
Case. Mr Tan is the only organiser who has confirmed the time.
Analysis. Only indicates a unique confirmed organiser. Notice that the answer depends on the antecedent of who inside the relative clause, not the number of the main-clause subject by itself; changing a decorative detail would not be enough to change the reasoning.
Challenge. State the practical implication. State the conclusion in one precise sentence, then add one sentence that names the evidence or relationship that makes it valid.
Deepening case 16: Question form
Case. Which of the pupils who are waiting is your partner?
Analysis. Pupils controls are; which one controls is. Notice that the answer depends on the antecedent of who inside the relative clause, not the number of the main-clause subject by itself; changing a decorative detail would not be enough to change the reasoning.
Challenge. Separate the decisions. State the conclusion in one precise sentence, then add one sentence that names the evidence or relationship that makes it valid.
Deepening case 17: Negative form
Case. She is one of the players who do not complain.
Analysis. Players controls do. Notice that the answer depends on the antecedent of who inside the relative clause, not the number of the main-clause subject by itself; changing a decorative detail would not be enough to change the reasoning.
Challenge. Change to the only player. State the conclusion in one precise sentence, then add one sentence that names the evidence or relationship that makes it valid.
Deepening case 18: Past perfect
Case. He was one of those who had completed the work.
Analysis. Had does not visibly change for number, but reference still matters. Notice that the answer depends on the antecedent of who inside the relative clause, not the number of the main-clause subject by itself; changing a decorative detail would not be enough to change the reasoning.
Challenge. Substitute a visible verb. State the conclusion in one precise sentence, then add one sentence that names the evidence or relationship that makes it valid.
Deepening case 19: Modal verb
Case. She is one of the pupils who can help.
Analysis. Can does not show number, so use meaning to track reference. Notice that the answer depends on the antecedent of who inside the relative clause, not the number of the main-clause subject by itself; changing a decorative detail would not be enough to change the reasoning.
Challenge. Rewrite with are able. State the conclusion in one precise sentence, then add one sentence that names the evidence or relationship that makes it valid.
Deepening case 20: Final audit
Case. Clause boundary, antecedent, restored noun, number and set meaning form the full check.
Analysis. Each step prevents a different error. Notice that the answer depends on the antecedent of who inside the relative clause, not the number of the main-clause subject by itself; changing a decorative detail would not be enough to change the reasoning.
Challenge. Apply to three new sentences. State the conclusion in one precise sentence, then add one sentence that names the evidence or relationship that makes it valid.
Finish the lab with a blank-page recall. Write the rule, its conditions, one confirming example, one near-miss and one independent check from memory. Compare that page with the article only after finishing. If the rule is correct but the condition is missing, the learning is not yet safe: an overgeneralised rule can produce confident errors. If the condition is correct but no example can be generated, practise construction rather than rereading.
Common misconceptions and targeted repairs
Misconception 1: One always means singular
What the learner may think. Every verb after one must be singular.
Why it fails. A relative pronoun may refer to the plural noun inside one of the pupils. The error feels efficient because it removes a decision, but it also removes the evidence boundary that makes the answer valid.
Targeted repair. Restore the antecedent. Use this short test immediately: Who performs the clause action?
Misconception 2: Nearest noun controls
What the learner may think. The word closest to the verb always determines agreement.
Why it fails. Reference and clause structure can point to an earlier plural noun. The error feels efficient because it removes a decision, but it also removes the evidence boundary that makes the answer valid.
Targeted repair. Draw an arrow from who to its noun. Use this short test immediately: What does who replace?
Misconception 3: Main subject controls all verbs
What the learner may think. Mina is singular, so every verb is singular.
Why it fails. Each clause has its own subject relationship. The error feels efficient because it removes a decision, but it also removes the evidence boundary that makes the answer valid.
Targeted repair. Check verbs clause by clause. Use this short test immediately: Which clause contains the verb?
Misconception 4: Only changes nothing
What the learner may think. One of and the only one have the same set meaning.
Why it fails. Only identifies a unique member and can change the antecedent of the clause. The error feels efficient because it removes a decision, but it also removes the evidence boundary that makes the answer valid.
Targeted repair. Paraphrase the number of qualifying members. Use this short test immediately: How many satisfy the description?
Misconception 5: Who is always singular
What the learner may think. The pronoun looks like one word, so it takes a singular verb.
Why it fails. Who inherits number from its antecedent. The error feels efficient because it removes a decision, but it also removes the evidence boundary that makes the answer valid.
Targeted repair. Replace it with the full noun. Use this short test immediately: People who are or person who is?
Misconception 6: Complex sounds better
What the learner may think. Use this structure whenever possible.
Why it fails. Unclear nesting weakens meaning and agreement. The error feels efficient because it removes a decision, but it also removes the evidence boundary that makes the answer valid.
Targeted repair. Prefer a shorter rewrite when reference is uncertain. Use this short test immediately: Can two simple sentences say it better?
Graded independent practice
Attempt each item without looking ahead. Write one line that identifies the controlling evidence before writing the final answer. Items 1–3 check recognition, 4–7 require explanation, and the later items change the surface form so that memory alone is insufficient.
Practice 1: Plural antecedent
Question. Choose: “She is one of the artists who paints/paint outdoors.”
Explained answer. paint
Why this answer earns trust. Who refers to artists. Transfer variation: Change to the only artist.
Practice 2: Singular antecedent
Question. Choose: “She is the only artist who paints/paint outdoors.”
Explained answer. paints
Why this answer earns trust. Who refers to the singular artist. Transfer variation: Remove only.
Practice 3: Two verbs
Question. Complete: “One of the doors that ___ locked ___ open.”
Explained answer. are; is
Why this answer earns trust. Doors controls are; one controls is. Transfer variation: Use was/were.
Practice 4: Books
Question. Repair: “It is one of the guides that contains maps.”
Explained answer. It is one of the guides that contain maps.
Why this answer earns trust. The guides in the set contain maps. Transfer variation: Make it the only guide.
Practice 5: Meaning
Question. How many people work hard in “Kai is one of those who work hard”?
Explained answer. More than one person belongs to the hard-working group, and Kai is one of them.
Why this answer earns trust. The plural antecedent defines a set. Transfer variation: Contrast with the only one.
Practice 6: Reference
Question. What does who refer to in “the only one who is absent”?
Explained answer. The singular only one.
Why this answer earns trust. The clause identifies the unique absent person. Transfer variation: Substitute a name.
Practice 7: Rewrite
Question. Remove ambiguity from a nested boxes/files sentence.
Explained answer. Name the damaged item directly, such as “One of the boxes that are damaged contains files.”
Why this answer earns trust. Explicit reference is safer. Transfer variation: Write a files version.
Practice 8: Composition
Question. Write a sentence grouping one friend with several helpers.
Explained answer. A valid answer uses one of the friends who help, with plural help.
Why this answer earns trust. Group meaning controls the verb. Transfer variation: Write a unique helper version.
Practice 9: Rule recall
Question. State the restore-the-noun test.
Explained answer. Replace who with its intended antecedent, then make the clause verb agree with that noun.
Why this answer earns trust. It exposes the controller. Transfer variation: Recall after a delay.
Practice 10: Transfer
Question. Edit five sentences using who, which and that.
Explained answer. Every relative-clause verb is justified by a named antecedent, and every main verb is checked separately.
Why this answer earns trust. The method transfers beyond one phrase. Transfer variation: Explain one near-miss.
Delayed transfer: prove that the learning lasts
Transfer test 1: Antecedent arrows
Mark twenty relative pronouns and draw each arrow to its antecedent. Do this after a delay, without rereading the worked examples. The purpose is to test retrieval and decision-making, not immediate imitation.
Success criterion. No verb is chosen from proximity alone. If the criterion is not met, return to the smallest missing decision rather than repeating the entire chapter.
Transfer test 2: Set paraphrases
Rewrite one of those and the only one sentences as plain statements about group size. Do this after a delay, without rereading the worked examples. The purpose is to test retrieval and decision-making, not immediate imitation.
Success criterion. The learner states how many members satisfy the clause. If the criterion is not met, return to the smallest missing decision rather than repeating the entire chapter.
Transfer test 3: Delayed editing
After a week, correct a mixed paragraph without a word bank. Do this after a delay, without rereading the worked examples. The purpose is to test retrieval and decision-making, not immediate imitation.
Success criterion. Main and relative-clause agreement decisions remain separate. If the criterion is not met, return to the smallest missing decision rather than repeating the entire chapter.
Examination control
1. Read the job before the story. Underline the command and the noun it governs. “Explain the change,” “state the word,” “find the fraction” and “identify the evidence” are different jobs even when the surrounding context is similar.
2. Separate given information from remembered information. Use only the facts supplied for the current task plus secure subject knowledge. Do not let a previous question, a familiar worksheet or an expected pattern silently become new evidence.
3. Write enough working to expose the decision. A marker or teacher should be able to see the relationship that justifies the answer. Extra sentences are not automatically stronger; the strongest working is concise, relevant and checkable.
4. Reserve a different-route check. For language, read the sentence for meaning and grammar. For mathematics, estimate or reverse the operation. For science, check the claim against the stated observation and a conservation or fair-test principle.
5. Stop when the requested job is complete. Unrequested speculation can contradict a correct answer. Add detail only when it explains the mechanism or satisfies another explicit part of the question.
Under time pressure, use a compact four-part margin routine: trigger → evidence → operation → check. Trigger names the feature that activates the method. Evidence identifies the exact words, values or observations allowed. Operation performs the language, mathematical or scientific step. Check asks whether the final statement answers the requested job, preserves units or referents, and avoids a stronger claim than the evidence supports.
A compact error log
After practice, do not record only “careless mistake.” Name the broken decision. Useful labels include trigger missed, evidence imported, relationship reversed, referent lost, unit dropped, operation correct but job wrong, and check repeated the same route. Add one prevention cue beside the label. A short accurate log is more useful than a long emotional account because it tells the learner what to do on the next item.
Review the log after two days and again after a week. Reattempt only one or two representative items first. If the method transfers, move to a mixed set. If it fails, repair the exact link between trigger and operation. This spacing matters because a solution can feel obvious while it is still visible and disappear when the page is closed.
Notes for parents and tutors
Ask the learner to replace who with the full noun before naming the correct verb. This makes the reference decision audible.
Do not teach “one means singular” as a complete rule. It works for the main clause in many examples but fails inside a relative clause whose antecedent is plural.
Use paired sentences that differ only in one of versus the only one so the learner sees how meaning changes agreement.
The adult’s most useful question is not “Why were you careless?” but “Which decision did the evidence require?” Ask the learner to point to the controlling word, value, relationship or observation. If the learner can explain that link, reduce support. If the learner cannot, model one example and then change the surface details for the next attempt.
Frequently asked questions
Why is are correct after one of the pupils who?
Because who refers to pupils inside the relative clause.
Why is is correct after the only one who?
Because the clause describes the singular only one.
Does one control the main verb?
Usually yes: one of the pupils is ready. Check the relative-clause verb separately.
Can which and that follow the same method?
Yes. Find the noun they represent and match the clause verb to it.
What is the fastest test?
Replace the relative pronoun with its full antecedent and read the clause.
What if the sentence stays ambiguous?
Rewrite it with the intended noun repeated or use two shorter sentences.
Next routes
Return to the complete volume directory to locate the series, use the original PSLE Learning Guide for the foundation route, and continue through PSLE English for verified subject guidance. The next useful task is a mixed set in which this idea is sometimes relevant and sometimes irrelevant; that is the point at which a learner must choose, not merely copy.