Grammar is one of the four criteria used to score IELTS Writing.
Even if your ideas are strong, frequent grammar errors can limit your score to Band 5 or 6.
The good news is that most IELTS grammar mistakes follow predictable patterns. Once you learn to recognise them, your writing becomes much clearer and more accurate.
In this guide, you’ll learn:
- ✅The most common grammar mistakes in IELTS Writing
- ✅Why students lose marks for these errors
- ✅How to fix them easily
If structure is confusing you:
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🎓Why Grammar Matters in IELTS Writing
Grammar is assessed under the Grammatical Range and Accuracy criterion.
Examiners evaluate:
- ✅Sentence structure variety
- ✅Grammar accuracy
- ✅Error frequency
- ✅Clarity of meaning
Frequent mistakes can prevent you from reaching Band 7, even if your ideas are good.
🧠Mistake 1: Subject–Verb Agreement
This is one of the most common grammar mistakes in IELTS essays.
The verb must match the subject in number.
👉Incorrect
People likes to use technology.
👉Correct
People like to use technology.
👉Another Example
Incorrect:
The number of students are increasing.
Correct:
The number of students is increasing.
This mistake often appears when students write quickly in Task 2 essays.
🔥Mistake 2: Incorrect Verb Tenses
Many IELTS tasks require specific verb tenses, especially in Task 1.
👉Example
When describing past data, use past tense.
Incorrect:
The number of cars increase between 2000 and 2010.
Correct:
The number of cars increased between 2000 and 2010.
👉Task 1 Tense Guide
Situation
Tense
Past data
Past tense
Current trends
Present tense
Predictions
Future forms
🎓Mistake 3: Sentence Fragments
A sentence fragment is an incomplete sentence.
👉Incorrect
Because technology improves communication.
This is not a complete idea.
👉Correct
Technology improves communication because it allows people to connect instantly.
Always ensure your sentence contains:
- ✅A subject
- ✅A verb
- ✅A complete thought
🏅Mistake 4: Run-On Sentences
Run-on sentences occur when two ideas are joined incorrectly.
👉Incorrect
Technology is important it improves communication.
👉Correct
Technology is important because it improves communication.
Or
Technology is important. It improves communication.
🚀Mistake 5: Article Errors (a / an / the)
Articles cause problems for many IELTS candidates.
👉Incorrect
Government should invest in education.
👉Correct
The government should invest in education.
Another example:
Incorrect:
Students should develop knowledge about environment.
Correct:
Students should develop knowledge about the environment.
🧠Mistake 6: Incorrect Plurals
Plural nouns are often used incorrectly.
👉Incorrect
Many student study abroad.
👉Correct
Many students study abroad.
Another example:
Incorrect:
People use many technology devices.
Correct:
People use many technological devices.
💡Mistake 7: Word Form Errors
Students sometimes use the wrong part of speech.
👉Incorrect
Technology is very benefit.
👉Correct
Technology is very beneficial.
Another example:
Incorrect:
Education improves develop.
Correct:
Education improves development.
Vocabulary accuracy is also evaluated under Lexical Resource.
⚡Mistake 8: Incorrect Prepositions
Prepositions can change the meaning of sentences.
👉Incorrect
People depend in technology.
👉Correct
People depend on technology.
Another example:
Incorrect:
Students benefit of online learning.
Correct:
Students benefit from online learning.
🎯Mistake 9: Overusing Simple Sentences
Many Band 5 essays use only short simple sentences.
Example:
Technology is important. It helps communication. People use it daily.
This limits your Grammatical Range score.
A better version:
Technology is important because it improves communication and allows people to connect globally.
🏅Mistake 10: Punctuation Errors
Incorrect punctuation can affect clarity.
👉Common Problems
Missing commas
Incorrect capitalisation
Missing full stops
Example:
Incorrect:
however technology has disadvantages
Correct:
However, technology has disadvantages.
🔥How to Improve Grammar for IELTS Writing
Improving grammar does not require memorising complicated rules.
Focus on these steps:
1️⃣ Practice writing regularly 2️⃣ Check common grammar patterns 3️⃣ Review mistakes after writing essays 4️⃣ Learn from feedback
Small improvements in grammar can significantly raise your band score.
🚀🚀 Get Instant Grammar Feedback
Most IELTS students wait days to receive corrections.
With Cybrik’s AI Writing Evaluator, you can:
- ✅Identify grammar mistakes instantly
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- ✅See detailed examiner-style feedback
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🎯 Improve your writing faster with immediate feedback.
⚡Frequently Asked Questions
👉What grammar mistakes reduce IELTS writing scores?
Common grammar mistakes include subject–verb agreement errors, incorrect verb tenses, article misuse, and sentence fragments.
👉Can grammar mistakes reduce my IELTS band score?
Yes. Frequent grammar errors can limit your score to Band 5 or 6, even if your ideas are good.
👉Do I need perfect grammar for Band 7?
No. Minor mistakes are acceptable as long as they do not affect clarity.
👉Which IELTS writing criterion evaluates grammar?
Grammar is evaluated under Grammatical Range and Accuracy, which contributes 25% of the final writing score.
👉How can I improve grammar quickly for IELTS?
The fastest way is to practice essays regularly and receive detailed feedback on your mistakes.