Editing

1. Diagnostic — How to Use This Book

This 50-sentence diagnostic identifies which STAMP CARD categories need your attention most. Most students are not uniformly weak across all nine categories — you have a specific profile. Spending 35 minutes here saves hours of unfocused revision later.

1.1 How to Use the Diagnostic

1. Attempt all 50 sentences. Write the correction on the answer line. Do not skip. Three sentences contain no error at all.
2. Do not check answers until you have finished all 50.
3. Mark your answers against the key in 1.3. Each sentence is tagged with its STAMP CARD category.
4. Tally your errors by category in the scoring table (1.4).
5. Prioritise the sections that correspond to the categories where you made one or more errors. These are your weakest areas.

1.2 The 50 Diagnostic Sentences

Identify and correct the one error in each sentence.

1.3 Diagnostic Answer Key

Finish all 50 first. The key stays hidden until you choose to reveal it.

1.4 Score Yourself by Category

Tally the number of correct answers in each row. The maximum for each category is shown in brackets; categories are tested unequally, so the totals differ.

Question counts per category are uneven because S and R are typically over-tested in exam passages.

2. The STAMP CARD Framework

Each letter in STAMP CARD represents one category of grammar error tested in the O-Level editing question. Think of it like a bubble tea stamp card: go through the letters one by one for every numbered line, check each category, and stamp off errors as you find them until you collect all 8 corrections.

2.1 The Nine Categories

The framework provides nine categories to check on every numbered line. The exam includes eight errors in total across the passage, with two lines deliberately error-free. The framework letters are the categories you check; they do not map one-to-one onto the eight errors.

2.1.1 Apply the STAMP CARD procedure to a passage

Technique: Use STAMP CARD as a checklist for every numbered line. Read the passage once for meaning first, then check each letter in order, prioritising T, S, A2.

1. Before reading a single word, write S-T-A-M-P-C-A-R-D in the margin.
2. Read the entire passage once for meaning. Identify the tense and topic. Do not correct yet.
3. For every numbered line, work through each letter in order. Stop the moment you find the error — each line has at most one.
4. Write your correction clearly. Tick error-free lines. Never leave any line blank.

2.2 Error Frequency by Category

The nine categories do not appear equally often. The table below ranks them by approximate frequency across recent 1184 editing passages. Use it to allocate revision time.

3. Error Types in Detail

Each error type is explained with the full grammar rule, all known sub-patterns, worked examples, and annotated thought-process boxes that explain how an expert reader identifies and corrects each error.

3.1 Tense Errors T

3.1.1 The Rule

The tense of every verb must match the time frame the passage is set in. Narrative and recount passages use the past tense. Informative and factual passages use the present tense. Your first read of the passage exists to establish the tense.

The three high-yield tenses. Past Simple, Present Simple and Present Perfect are the only tenses heavily tested in editing. Learn these three thoroughly before the others.

For the full twelve-tense reference, see Appendix A.

3.1.2 Identify the wrong tense

1. Read the full passage once. Identify the tense from time markers or context.
2. For each numbered line, identify the main verb.
3. Ask — does this verb match the passage tense?
4. If not, correct it to the appropriate tense form.

3.1.3 Practice — Tense

1. She walk to school every day.
2. He has visit the museum last week.
3. By the time she arrived, he left.
4. The bridge is building across the river. (Describe a completed state.)
5. They are enjoy the show right now.
6. Scientists studied the effects of pollution. (Passage is in present tense.)
7. She already finished her homework. (Use a signal word for Present Perfect.)
8. When the teacher entered, the students finished their test.
9. He has called her yesterday.
10. The results were announcing last Friday.

3.2 Subject-Verb Agreement S

3.2.1 The Rule

A singular subject takes a singular verb. A plural subject takes a plural verb. The exam places extra words between the subject and the verb to make the wrong noun look like the subject. Your job is to strip those words out.

3.2.2 Identify the true subject

1. Identify the main verb in the clause.
2. Ask: who or what is doing or being this? That is the subject.
3. Ignore everything between the subject and the verb.
4. Is the true subject singular or plural? Match the verb accordingly.

3.2.3 Practice — Subject-Verb Agreement

1. The group of researchers have published their findings.
2. Each of the students have completed the task.
3. Neither the manager nor the staff members was informed.
4. A number of residents has complained about the noise.
5. The committee have decided to postpone the meeting.
6. The list of requirements have been updated.
7. Everyone in the two classes are expected to attend.
8. Neither John nor his friends was invited to the event.
9. The team of engineers are working on the problem.
10. The number of complaints are rising every month.

3.3 Article Errors A1

3.3.1 The Rule

The articles are a, an and the. The key distinction for a vs an is the sound the following word begins with — not the letter.

3.3.3 Practice — Articles

1. She waited for a hour before the doctor arrived.
2. He is an university student studying economics.
3. I saw a elephant at the zoo.
4. She is a honest and hardworking person.
5. He bought the some books from the library.
6. She is interested in a environment and sustainability.
7. It was an historic moment for the country. (Mark ‘no error’ if correct.)
8. She has a MBA from a prestigious university.
9. He gave an useful piece of advice.
10. The government introduced a new policy to protect a wildlife.

3.4 Pronoun Errors M

3.4.1 The Rule

A pronoun must agree with its antecedent in number, gender and person, and must be in the correct form for its role: subject, object, possessive or reflexive.

3.4.3 Practice — Pronouns

1. This students are grateful for the help.
2. Him and her completed the task together.
3. The teacher gave the books to John and I.
4. Please send the report to myself by Friday.
5. Everyone must submit their own work by the deadline. (Accept singular ‘their’.)
6. Each student must complete their own project. (Accept singular ‘their’.)
7. The students submitted her work on time.
8. The boy lost his way; she was frightened.
9. Between you and I, the project is behind schedule.
10. Neither of the candidates have submitted their application.

3.5 Preposition Errors P

3.5.1 The Rule

A preposition error occurs when the wrong preposition is used with a verb, adjective or noun. These are fixed phrases (collocations): they are settled by usage rather than by rule, so each one has to be learnt individually.

Entries marked ★ are recurrent high-yield phrases. Learn these first.

• interested in ★
• responsible for ★
• different from
• depend on ★
• consist of
• result in
• comply with
• suffer from
• capable of ★
• apologise for
• accuse of
• associated with ★
• afflicted with ★
• aim at / for
• interfere with
• grateful for ★
• proud of ★
• dedicated to
• participate in
• believe in
• insist on ★
• good at ★
• afraid of
• familiar with ★
• accustomed to
• fond of
• disappointed with

3.5.3 Practice — Prepositions

1. She is very capable ______ handling pressure.
2. The students were grateful ______ the teacher’s generous help.
3. The policy aims ______ reducing traffic congestion in the city.
4. He is very interested ______ learn more about marine biology.
5. She insisted at meeting the director in person.
6. They are very proud in their school’s achievements.
7. The committee is responsible of ensuring fair practices.
8. She is very familiar in the procedures required.
9. He was disappointed about his examination results.
10. The new policy is associated to significant economic benefits.

3.6 Connector Errors C

3.6.1 The Rule

A connector error occurs when the wrong linking word is used, or when two conflicting connectors appear together. The connector must accurately reflect the logical relationship between the clauses it joins.

3.6.3 Practice — Connectors

1. She studied hard, so she failed the exam.
2. Although the policy was popular, but it was poorly executed.
3. He is not only intelligent, and also diligent.
4. Neither John or Mary was invited to the event.
5. Despite he was late, he managed to complete the task.
6. She works hard, so she never achieves her targets.
7. Both the teacher as well as the students were present.
8. Whether he passes or not remains uncertain.
9. Although she was nervous, but she delivered an excellent speech.
10. She studied hard, however she failed the test.
11. Because he was tired, so he went to bed early.

3.7 Word Form Errors — Adjective / Adverb A2

3.7.1 The Rule

An adjective modifies a noun. An adverb modifies a verb, adjective or another adverb. This is the most frequently tested error type. The error is almost always an adjective used where an adverb is needed.

1. Find the word you are checking.
2. Find what it is modifying, or what role it plays in the sentence.
3. Apply the rule: modifies a noun → adjective; modifies a verb/adjective/adverb → adverb; is the subject or object → noun; expresses the action → verb.
4. Convert to the correct form.

3.7.3 Practice — Word Form

1. She handled the situation very efficient.
2. The beauty girl won the national competition.
3. Her improve over the semester was remarkable.
4. He drives careful on the expressway every day.
5. The students were extreme disappointed with their results.
6. She sings beautiful on stage every performance.
7. He is a fluency English speaker who lives abroad.
8. They work hardly to meet every single deadline.
9. The team performed impressive under difficult conditions.
10. She is a success businesswoman who founded three companies.
11. The economical situation in the country is worsening.
12. The teacher gave me good advise on my essay.

3.8 Singular / Plural and Determiner Errors R

3.8.1 The Rule

R covers two related error types: (1) a noun in the wrong number; (2) a determiner or quantifier that does not match its noun. Do not confuse R with S. S is about the verb not agreeing with the subject. R is about the noun itself being in the wrong form, or its determiner being wrong.

Uncountable nouns (no plural form): information, advice, furniture, equipment, luggage, knowledge, news, progress, research, traffic, weather, work, music, money, food, education, evidence, homework, accommodation, behaviour, damage, harm, luck, scenery, travel.

3.8.3 Practice — Singular / Plural

1. Many informations were shared at the conference yesterday.
2. Every students must submit their work by Monday morning.
3. The problems facing the elderly are not just medical one.
4. She has less friends now than she did before.
5. There is many water left in the tank.
6. The criteria for selection has not been announced.
7. He ate much cookies after the examination.
8. These information is not available to the public.
9. The number of complaints are rising every single month.
10. A number of residents has complained about the excessive noise.
11. A large amount of students attended the seminar.
12. The data shows a worrying trend. (Treat ‘data’ as plural in formal academic usage.)

3.9 Comparative and Superlative Errors D

3.9.1 The Rule

D errors involve using the wrong degree of comparison, or forming it incorrectly by combining both the -er/-est suffix and the word more/most on the same adjective. Three degrees: positive (base), comparative (two), superlative (three or more).

3.9.3 Practice — Degree of Comparison

1. Singapore is one of the most safest cities in the world.
2. She is more smarter than her classmates by a significant margin.
3. Of the two candidates, she is the most qualified for the role.
4. He is the most intelligent of the two finalists.
5. This method is more better than the previous one used.
6. 25 per cent of Singaporeans will be 65 years and oldest by 2030.
7. She is more happier than she was last year.
8. This is the most simplest explanation I can provide.
9. He runs more faster than anyone else on the team.
10. Of all the students, she scored the more highly on the test.

4. Worked Passage

Work through this in three stages: attempt the clean passage on your own; check against the revealed version, where the candidate error words are underlined; then compare against the annotated key, including the common wrong corrections students typically write.

4.1 Clean Passage (Your First Attempt)

1. Write S-T-A-M-P-C-A-R-D in your margin before reading anything.
2. Read the entire passage once for meaning. Identify the tense. Do not correct yet.
3. Go back to line 1. For every numbered line, run through T, S, A2 first, then M, P, C, A1, R, D.
4. Write your correction. Tick error-free lines. Never leave any line blank.
5. Target time: 10 minutes. 2 minutes first read, 6 minutes line-by-line, 2 minutes review.

4.2 Revealed Passage (Candidate Errors Underlined)

The underlined words are the candidate error sites. Verify whether your corrections targeted these words. If you corrected a different word, the issue is your diagnostic — you flagged the wrong line position.

4.3 Annotated Answer Key with Common Traps

The Common Wrong Correction column records the mistake students most frequently make on that line. Even if you got the right answer, read this column.

5. Confusables Cheat Strip

The high-frequency word pairs that the exam exploits. These look or sound similar but mean different things, so they are easy to mix up under time pressure. Revise this single page in the final week before the exam.

5.1 Adjective Confusables

5.2 Verb vs Noun Confusables

5.3 Flat Adverbs (No -ly)

These adverbs do not take -ly. Adding -ly either produces a non-word or a word with a different meaning.

5.4 Quantifier Confusables

5.5 Irregular Plurals (Latin / Greek Origin)

6. Exam Tips

6.1 Timing Strategy

The editing question is worth 8 marks in Paper 1 and should take no more than 10 minutes. Pacing matters more than any single grammar tip.

6.2 Final Strategy Checklist

1. Read for meaning first. The first read establishes the tense and topic, essential for T and C errors.
2. Check T, S, A2 first on every line. These three account for the majority of errors. (A2 is word form — A1, articles, is tested less often.)
3. Two lines are always correct. If STAMP CARD reveals nothing, tick it and move on.
4. Write corrections clearly. Underline the error word; write the correction on the answer line. Ambiguous markings lose marks even when the answer is right.
5. Each numbered line has at most one error. Once found, move on. Do not look for a second error on the same line.
6. Memorise the high-yield fixed phrases (P). See the starred entries in 3.5.
7. For D errors, count the things being compared. Two → comparative. Three or more → superlative.
8. Do not guess on the first pass. If stuck after all nine letters, mark the line and return. A second pass under T, S or A2 almost always reveals the answer.
9. Distinguish A1 from A2. A1 is Articles. A2 is word form. Two separate checks on every line.

7. Practice Question Answer Keys

Appendix A — Full Twelve-Tense Reference

The three tenses tested most often in 1184 editing are Past Simple, Present Simple and Present Perfect (see 3.1). This appendix lists all twelve for completeness.