How To Improve Grammar: A Practical Roadmap For Singapore Secondary & O-Level Students

If you’re in Secondary school in Singapore, you already know this: good grammar can quietly make or break your English grade.

You might have great ideas, but if your sentences are full of tense errors, wrong prepositions, or awkward phrasing, your marks for Paper 1 (Writing) and Paper 2 (Language Use & Comprehension) will suffer — especially at O Levels.

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The good news? Grammar is very trainable, as long as you follow a clear, step-by-step plan and get enough targeted practice.

This guide is written specifically for Singapore Secondary and O-Level students, aligned to what you actually see in MOE schools and national exams. I’ll walk you through:

• A step-by-step tutorial to fix your grammar systematically
• An exam strategy guide for O-Level-style questions
• How to do worksheet practice, including harder variants
• The common grammar mistakes Singapore students keep making
• How to use Tutorly.sg, a 24/7 AI tutor website built for Singapore students, to speed everything up

By the end, you’ll know exactly what to practise, how to practise, and how to check if you’re improving.

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Step-by-step tutorial

Instead of randomly doing grammar worksheets, use this roadmap. Treat it like training for NAPFA: you don’t just “run more”, you train specific components.

Step 1: Fix your sentence structure foundation

If your sentences are messy, everything else becomes harder. Start here.

1. Learn to spot a complete sentence

A complete sentence needs:

1. A subject $who/what$
2. A verb $action/state$
3. A complete idea

Examples:

• Correct:

  • “The teacher explained the concept clearly.”
  • “Many students struggle with grammar.”

• Wrong (fragments):

  • “Because the teacher explained.”
  • “Although many students struggle.”

What to do:

• Take a paragraph from your own composition.

• Underline each sentence.

• Check: Does each one have a clear subject + verb + complete idea?

• If not, rewrite it:

  • Fragment: “Because I was late for school.”
  • Fix: “I was late for school because I missed the bus.”

Do this for one paragraph a day. It takes 5 minutes and builds awareness.

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Step 2: Get your tenses under control

Tense errors are one of the most common reasons for losing marks in Editing (Paper 2) and in compositions.

Focus on the tenses you actually use most in exams:

• Simple Present – facts, habits

  • “He goes to school by bus.”

• Simple Past – completed actions

  • “Yesterday, he went to school by bus.”

• Present Continuous – actions happening now

  • “He is going to school now.”

• Past Continuous – actions in progress in the past

  • “He was going to school when it started to rain.”

• Present Perfect – actions that happened before now, with effect on present

  • “He has gone to school already.”

What to do (daily 10-minute drill):

1. Pick a short event from your life (e.g. “My journey to school this morning”).
2. Write 3–4 sentences using only Simple Past.
3. Rewrite the same event in Present Tense (as if it’s a routine).
4. Check: Did you accidentally mix tenses within the same time frame?

You can also use Tutorly.sg for this:

• Go to: https://tutorly.sg/ai-tutor-singapore
• Paste your short paragraph.
• Ask Tutorly to highlight tense errors and explain the correct tense.
• Rewrite once more based on the explanation.

Tutorly.sg is built for MOE students, so it explains in a way that matches what your teachers use in class.

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Step 3: Clean up subject–verb agreement

This is heavily tested in Editing and Grammar MCQ questions.

Basic rule:

• Singular subject → singular verb
• Plural subject → plural verb

But the tricky part is when the subject is not obvious.

Common patterns tested in O-Level-style questions:

1. Words between subject and verb

• “The group of students is waiting outside.” $Subject = group, not students$
• “The pile of books was on the floor.”

2. Either… or / Neither… nor

• “Either my parents or my brother is coming.” (Verb agrees with the nearer subject)

3. Collective nouns

• “The team is winning.” (As a single unit)
• “The team are arguing among themselves.” (As individuals – more UK usage; MOE accepts this when logically used)

What to do:

Create your own mini drill:

• Write 5 sentences with tricky subjects:
  • “A bunch of…”
  • “A group of…”
  • “Neither… nor…”
  • “Each of the…”
  • “Everyone…”

Then:

• Check your own answers using Tutorly.sg.
• Ask: “Explain why this verb form is correct for this subject.”
• Read the explanation, then create 3 new sentences using the same pattern.

This way, you’re not just memorising — you’re practising patterns that actually appear in exams.

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Step 4: Fix common preposition problems

Prepositions are small, but MOE loves testing them.

Common ones:

• “interested in”, not “interested on”
• “good at Maths”, not “good in Maths” (though “good in Mathematics” sometimes appears, “good at” is safer)
• “depend on”, not “depend of”
• “afraid of”, not “afraid from”

And also:

• “on the bus / in the car / on the MRT”
• “at night / in the morning / in January / on Monday”

What to do:

1. Start a Preposition Notebook (or a notes section on your laptop).

2. Whenever you see a phrase in your school worksheet or Ten-Year Series, note it down:

   • “responsible for…”
   • “participate in…”
   • “complain about…”

3. Every few days, test yourself:

   • Cover the prepositions and try to fill them in.
   • Check your answers with Tutorly.sg or your textbook.

Because these are fixed phrases, exposure and repetition work better than memorising a giant list once.

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Step 5: Learn to combine sentences smoothly

At O Levels, your writing needs to sound mature and fluent, not like a Primary school composition. Grammar isn’t only about “correct”; it’s also about how natural your sentences sound.

Key tools:

1. Coordinating conjunctions (FANBOYS: for, and, nor, but, or, yet, so)
2. Subordinating conjunctions (because, although, since, when, while, if, unless, etc.)
3. Relative pronouns (who, which, that, where, when)

Example:

• Childish style (short choppy sentences):
  “I was late. I missed the bus. I had to take a taxi. It was expensive.”

• Improved style:
  “Because I missed the bus, I was late and had to take a taxi, which was expensive.”

What to do:

Take 4 short, simple sentences and combine them into 2 longer, smoother ones.

Then:

• Ask Tutorly.sg: “Is my sentence grammatically correct and natural for O-Level English?”
• If it suggests improvements, rewrite and compare.

Do this regularly for your composition intros and conclusions.

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Step 6: Apply grammar to your actual school work

Grammar practice only helps your grades if it shows up in your:

• Composition $Paper 1$
• Situational writing
• Comprehension open-ended answers
• Editing $Paper 2$

Pick one piece of school work each week (e.g. a composition you just got back) and:

1. Circle all the grammar corrections your teacher made.

2. Sort them into categories:

   • Tenses
   • Subject–verb agreement
   • Prepositions
   • Sentence structure
   • Others (e.g. pronouns, articles)

3. For each category, write 1–2 new sentences using the correct form.

If you don’t have a teacher’s feedback yet, you can paste your composition into Tutorly.sg and ask it to:

• Point out grammar errors
• Explain why they’re wrong
• Show a corrected version

Tutorly.sg has already been used by thousands of students in Singapore, and it’s even been mentioned on Channel NewsAsia (CNA), so it’s not some random overseas tool that doesn’t understand our syllabus.

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Exam strategy guide

Grammar in exams isn’t just about “being good at English”. It’s about knowing how marks are given in Paper 1 and Paper 2 and playing to that system.

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1. Grammar in O-Level Paper 1 (Writing)

Grammar affects:

• Language marks for your continuous writing
• Accuracy and tone in situational writing (e.g. emails, reports)

Strategies:

1. Use tenses you’re confident with

If you always mess up Present Perfect, don’t force it.
For narratives, stick mainly to Simple Past, with some Past Continuous where needed.

2. Keep sentence structures clear

You don’t need to write super long sentences to “sound pro”. Long but wrong is worse than short but correct.

A good mix:

• 60–70% medium-length sentences
• 20–30% short sentences for impact
• A few well-controlled complex sentences

3. Do a 3-minute grammar scan at the end

Before you submit:

• Quickly scan for:
  • Consistent past tense
  • Subject–verb agreement in tricky sentences
  • Common prepositions (“interested in”, “afraid of”, etc.)
• Check your first paragraph and last paragraph especially — exam stress often causes careless errors there.

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2. Grammar in O-Level Paper 2 (Language Use & Comprehension)

Paper 2 has several components that directly test grammar:

• Editing for Spelling and Grammar
• Grammar MCQ / Cloze passages
• Comprehension open-ended (sentence-level accuracy)

Editing section strategies:

1. Read the whole passage once without correcting anything. Get the context first.

2. On the second reading, look at each underlined word and ask:

   • Is the tense logical for the time?
   • Does the subject match the verb?
   • Is this the correct preposition / connector?
   • Is there a more appropriate word form (noun vs verb vs adjective)?

3. If you’re unsure, mentally replace the whole phrase:

   • “He was good in playing basketball.” → “He was good at playing basketball.”

Grammar MCQ / cloze strategies:

1. Use elimination. Remove obviously wrong options first.
2. Read the sentence with each option inserted and listen to which sounds correct and natural.
3. Look at clues from nearby sentences (time expressions, pronouns, etc.) to decide tense and connectors.

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3. Time management with grammar in mind

In both Papers:

• Don’t spend too long “perfecting” every sentence as you write.
• Focus on clarity first, then grammar during checking time.
• Build a personal checklist of your top 3 usual errors and quickly scan for them in the last 5–10 minutes.

Example checklist:

1. Did I keep everything in past tense for my narrative?
2. Did I accidentally write “he don’t” instead of “he doesn’t”?
3. Did I use the right prepositions for common phrases?

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Worksheet practice

To really improve, you need targeted practice that slowly becomes more difficult — similar to how MOE structures school exams and the O Levels.

Below are practice ideas you can try on your own, plus some harder exam-style variants.

1. Basic practice: Tenses and subject–verb agreement

Exercise A (Tenses – basic):

Rewrite these sentences in the correct tense based on the time expression:

1. Yesterday, he (go) to school by MRT.
2. Every Saturday, she (help) her mother at the market.
3. Right now, they (play) basketball at the court.
4. So far, we (finish) three chapters of the book.
5. When I arrived, they (eat) dinner.

After you attempt them, you can key in your answers on Tutorly.sg and ask:

“Check my answers and explain any tense errors using MOE-style explanations.”

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2. Intermediate practice: Editing-style questions

Exercise B (Editing – intermediate):

Each sentence contains one grammar error. Identify and correct it.

1. The group of friends were planning a surprise party for their classmate.
2. Neither my parents nor my sister are free to attend the meeting.
3. She is very good in playing the piano.
4. If he will study harder, he will pass the test.
5. The teacher, together with her students, have organised the event.

You’re training the exact skill needed for the Editing section in Paper 2.

To make it more exam-like, paste the sentences into Tutorly.sg and ask it to:

• Mark which word is wrong
• Give the correct word
• Explain why

Then, try to create one new sentence using each corrected pattern.

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3. Hard exam variants: Cloze and transformation

Now let’s push into harder, O-Level-style practice.

Exercise C (Grammar cloze – harder variant)

Fill in each blank with the most suitable word. Some blanks may require a preposition, some a conjunction, some a verb form.

When Jason first entered Secondary One, he struggled ___ $1$ English grammar. He often mixed ___ $2$ his tenses and used the wrong prepositions. His teacher advised him to read more, ___ $3$ Jason felt that reading alone was not enough.

One day, his friend recommended a website that could explain grammar rules clearly ___ $4$ give instant feedback on his writing. Jason decided to try it. At first, he made many mistakes, ___ $5$ he did not give up. Over time, he became more confident ___ $6$ writing accurate sentences and his test scores improved steadily.

Try it yourself first, then:

• Type your answers into Tutorly.sg.
• Ask: “Check my cloze answers and explain any wrong ones.”

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Exercise D (Sentence transformation – harder variant)

Rewrite each sentence as instructed, without changing its meaning. Pay attention to grammar accuracy.

1. “I started revising only when my teacher warned me about my grades,” said Amir.

   • Begin with: It was only when…

2. The students completed the project, although they had very little time.

   • Begin with: Despite…

3. She is too tired to concentrate on her homework.

   • Use: so…that…

4. “I will help you if you ask me politely,” my brother told me.

   • Begin with: My brother said that…

These are similar to what you see in school mid-years, end-of-years, and some O-Level Paper 1/2 practices.

After you attempt them:

• Paste your answers into Tutorly.sg
• Ask: “Are these transformations grammatically correct and suitable for O-Level English? If not, show me an improved version and explain why.”

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4. Applying grammar to composition paragraphs

Exercise E (Composition paragraph – applied practice):

Write a 120–150 word paragraph on one of these topics:

• “A time you made a difficult decision”
• “An unexpected problem during a school event”

Focus on:

• Consistent tense
• Correct subject–verb agreement
• Natural connectors (because, although, however, therefore, etc.)

Then:

1. Check it once yourself.

2. Paste it into Tutorly.sg and ask for:

   • Grammar corrections
   • 2–3 suggested sentence improvements
   • A short explanation of your top 3 recurring grammar problems

3. Rewrite the paragraph once more, applying the feedback.

This “write → get feedback → rewrite” loop is where you’ll see real improvement.

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Common mistakes

Here are the grammar problems I see Singapore Secondary and O-Level students make again and again.

Use this as a checklist against your own writing.

1. Mixing tenses within the same time frame

Example:

• Wrong: “Yesterday, I wake up late and missed the bus.”
• Correct: “Yesterday, I woke up late and missed the bus.”

Fix: When you see a time word like “yesterday”, “last week”, “in 2022”, keep everything in Simple Past unless there is a clear reason not to.

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2. “He don’t / She don’t”

Example:

• Wrong: “He don’t like Maths.”
• Correct: “He doesn’t like Maths.”

Fix: For he / she / it / singular noun, use does / doesn’t + base verb.

• He doesn’t like…
• She doesn’t want…
• The boy doesn’t know…

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3. Wrong prepositions after common adjectives/verbs

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Examples:

• Wrong: “She is interested on Science.”

• Correct: “She is interested in Science.”

• Wrong: “I am good in playing football.”

• Better: “I am good at playing football.”

• Wrong: “They complained about on the noise.”

• Correct: “They complained about the noise.”

Fix: Whenever you learn a new adjective or verb, learn it together with its preposition:

• proud of
• responsible for
• participate in
• rely on

Keep a running list in your notes.

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4. Overusing “and” instead of using proper connectors

Example:

• Weak: “I was tired and I continued studying and I felt sleepy and I fell asleep at my desk.”
• Stronger: “Although I was tired, I continued studying. Eventually, I felt so sleepy that I fell asleep at my desk.”

Fix: Use a variety of connectors:

• To show contrast: although, however, despite, even though
• To show cause and effect: because, therefore, as a result
• To show sequence: first, then, afterwards, finally

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5. Run-on sentences (no proper punctuation)

Example:

• Wrong: “I rushed out of the house I forgot my wallet I had to go back.”
• Correct:
  • “I rushed out of the house, but I forgot my wallet, so I had to go back.”
  • Or: “I rushed out of the house. I forgot my wallet, so I had to go back.”

Fix: If your sentence has more than one complete idea, use:

• A full stop
• A comma + conjunction (and, but, so, yet, etc.)
• Or rewrite into a complex sentence with “because / although / when / while…”

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6. Confusing “much” and “many”, “less” and “fewer”

Examples:

• Wrong: “There are much people in the hall.”

• Correct: “There are many people in the hall.”

• Wrong: “There are less students in this class.”

• Better (for exams): “There are fewer students in this class.”

Quick rule:

• Many / few / fewer → countable nouns (students, books, cars)
• Much / little / less → uncountable nouns (water, sugar, time, money)

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7. “Can” vs “could” vs “will be able to”

Students often use “can” for everything.

Examples:

• Present ability: “I can swim.”
• Past ability: “When I was younger, I could swim very fast.”
• Future ability: “If I practise, I will be able to swim faster.”

In compositions, using the right form makes your writing more precise and mature.

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8. Direct translation from Mother Tongue

Common patterns:

• “I very like this” (influenced by Chinese) → “I like this very much.”
• “Last time I always go there” → “In the past, I always went there.”

Be aware when you’re thinking in your Mother Tongue first. If a sentence feels like a direct translation, double-check it.

You can even test suspicious sentences on Tutorly.sg and ask:

“Does this sound natural and grammatically correct in Singapore O-Level English?”

It will suggest a more natural version if needed.

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How Tutorly.sg can fit into your grammar routine

You don’t need a private tutor just to improve grammar. What you really need is:

• Fast, clear explanations when you’re stuck
• Instant feedback on your sentences and paragraphs
• Practice that matches MOE / O-Level style

That’s exactly what Tutorly.sg is built for.

It’s a 24/7 AI tutor website made specifically for Singapore students from Primary 1 to JC 2, aligned to the MOE syllabus. It’s been used by thousands of students in Singapore and even featured on Channel NewsAsia (CNA), so it’s not some random overseas tool guessing your syllabus.

You can:

• Ask grammar questions anytime (“What’s the difference between ‘although’ and ‘despite’?”)
• Paste your composition paragraphs for grammar correction and explanation
• Practise exam-style questions and get step-by-step solutions (it checks your final answer, then shows how to get there)
• Get suggestions to make your sentences sound more natural for O-Level standard

Start here: https://tutorly.sg/ai-tutor-singapore

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Final thoughts (and a simple next step)

Improving grammar for Secondary and O-Level English isn’t about memorising every rule in one night. It’s about:

1. Fixing your foundations (sentence structure, tenses, subject–verb agreement)
2. Building daily habits (short drills, paragraph practice)
3. Applying grammar to your actual school work
4. Getting fast, reliable feedback so you don’t repeat the same mistakes

If you want a simple next step:

1. Choose one weakness from this article (e.g. tenses or prepositions).
2. Spend 15–20 minutes today doing one of the practice exercises.
3. Use Tutorly.sg to check your answers and understand your mistakes.
4. Repeat tomorrow with a new mini-task.

You don’t have to do this alone, and you don’t have to wait for your teacher’s consultation slot.

You can start practising and getting feedback anytime at:

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Try Tutorly.sg (Singapore)

Start here: AI Tutor Singapore

Try Tutorly on the website $no sign-up$: https://tutorly.sg/app

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• https://tutorly.sg/ai-tutor-singapore
• https://tutorly.sg/app

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