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IELTS Band-9 Grammar & Sentence Guide (Quick Recap + Full Rule Explanations)
1️⃣ Sentence Variety
Rule: Use a mix of simple, compound, and complex sentences to show range.
- Simple: Technology improves lives.
- Compound: Technology improves lives, and it also creates challenges.
- Complex: Although technology improves lives, it also creates challenges.
Why: Using different sentence types makes your writing/speaking sound natural and shows control over grammar. Examiners mark you higher for variety.
Result: Shows grammatical flexibility and keeps writing natural.
2️⃣ Subject-Verb Agreement
Rule: The verb must match the subject in number and person.
- People like music.
- Each person has an opinion.
Why: Words like each, every are singular, so they require a singular verb (e.g., “has”) even if the meaning is plural.
Result: Prevents basic grammar mistakes that lower band score.
3️⃣ Articles (a, an, the)
Rule: Use articles correctly for countable/uncountable nouns.
- a book, the internet, education (no article)
Why: Articles specify or generalize nouns. “A”/“an” for non-specific singular nouns, “the” for specific nouns, no article for general ideas or uncountables.
Result: Correct use of articles improves accuracy and clarity.
4️⃣ Noun Phrases & Adjective Order
Rule: Adjectives must follow natural order: opinion → size → age → shape → color → origin → material → purpose + noun
- Example: a beautiful small old round brown Italian wooden coffee table
Why: Misordering adjectives can confuse meaning and sound unnatural. Native speakers instinctively follow this order.
Result: Makes descriptions clear and professional.
5️⃣ Collocations
Rule: Use natural word pairings instead of arbitrary combinations.
- prone to errors, highly beneficial, rapid growth, play a vital role, pose a threat
Why: Collocations sound natural. Wrong combinations (e.g., prone to do) are marked as errors.
Result: Enhances lexical resource and makes language sound native.
6️⃣ Tense Control
Rule: Use the correct tense to match time and context.
- Present Simple: general truths (Water boils at 100°C)
- Present Perfect: past experience / link to present (I have studied English for 10 years)
- Past Simple: finished time (I studied English yesterday)
- Future: will, be going to, or perfect forms (By 2030, people will have shifted to renewable energy)
Why: Tenses show when an action happens. Wrong tenses confuse meaning and lower your band.
Result: Shows range and control of grammar structures.
7️⃣ Relative Clauses
Rule: Use who/which/that to add extra information.
- The man who lives next door is a teacher.
- Climate change, which is a global issue, requires urgent action.
Why: Relative clauses make sentences more complex and precise. They show advanced grammar knowledge.
Result: Adds sophistication and precision.
8️⃣ Conditional Sentences
Rule: Use if-clauses to show cause-effect or hypothetical situations.
- If governments invest in education, societies will prosper.
- If people had exercised more, obesity would have been less common.
Why: Conditionals show logical reasoning and mastery of complex structures.
Result: Demonstrates logical reasoning and complex structures.
9️⃣ Passive Voice
Rule: Use passive to emphasize the action rather than the subject.
- The law was introduced in 2015.
- Steps should be taken to address pollution.
Why: Passive is common in formal writing and avoids repetitive subjects. It shows control over sentence structures.
Result: Makes writing formal and academic.
🔟 Punctuation & Hyphen Use
Rule: Use commas for clauses and hyphens for compound adjectives.
- long-term effects, plant-based diet
- Avoid run-on sentences.
Why: Proper punctuation prevents misreading and improves clarity. Hyphens connect words that function together as a single adjective.
Result: Enhances readability and professionalism.
✅ Bonus Tips for Band 9
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Accuracy: Very few mistakes.
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Range: Use different sentence structures naturally.
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Flexibility: Adapt grammar to ideas.
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Linking Words: however, therefore, moreover, for example.
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Collocations & Idioms: play a vital role, take proactive measures, significant impact.
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Gerunds & Infinitives:
- Learning a new language improves cognitive skills.
- People are prone to making mistakes when stressed.
- It is important to follow rules in society.
Why: Bonus tips make your language richer, natural, and precise.
Result: Shows mastery of grammar and lexical resource, essential for Band 9.
📝 Usage Tip:
- Keep this sheet handy and practice using these rules in every Writing Task 2 and Speaking Part 2/3 answer. Understanding why each rule works helps you avoid