10 Grammar Mistakes That Lower IELTS Writing Scores
Grammar is one of the four assessment criteria in IELTS Writing, and grammar mistakes can significantly reduce your score if they occur frequently or make communication unclear.
Many students believe they need extremely advanced grammar to achieve a high band score. However, in reality, IELTS examiners care much more about:
- accuracy
- clarity
- control
A simple sentence written correctly is usually better than a complicated sentence full of mistakes.
In this article, you will learn:
- the most common grammar mistakes in IELTS Writing
- why these mistakes lower scores
- how to correct them
- practical examples of better grammar usage
1. Missing the Verb “Be”
This is one of the most common mistakes among IELTS learners.
Incorrect
There many advantages of technology.
Correct
There are many advantages of technology.
Incorrect
The government responsible for education.
Correct
The government is responsible for education.
Why this matters:
Missing “be” verbs make sentences incomplete and grammatically incorrect.
2. Subject–Verb Agreement Errors
The verb must agree with the subject.
Incorrect
People enjoys using smartphones.
Correct
People enjoy using smartphones.
Incorrect
Technology have changed modern life.
Correct
Technology has changed modern life.
These mistakes are very noticeable to examiners.
3. Incorrect Use of Articles (a, an, the)
Articles are difficult for many learners but extremely important in English.
Incorrect
Government should invest in education.
Correct
The government should invest in education.
Incorrect
It is important to have healthy lifestyle.
Correct
It is important to have a healthy lifestyle.
Incorrect article use can make writing sound unnatural.
4. Incorrect Plural Forms
Incorrect
Many student study abroad.
Correct
Many students study abroad.
Incorrect
People need more information about environmental problem.
Correct
People need more information about environmental problems.
Singular and plural mistakes occur very frequently in IELTS essays.
5. Sentence Fragments
A sentence fragment is an incomplete sentence.
Incorrect
Because technology improves communication.
This is not a complete sentence.
Correct
Technology is important because it improves communication.
Every sentence must contain:
- a subject
- a verb
- a complete idea
6. Run-On Sentences
Some students connect too many ideas without proper punctuation.
Incorrect
Technology is useful it helps people communicate it also improves education.
Correct
Technology is useful because it helps people communicate, and it also improves education.
Run-on sentences reduce clarity significantly.
7. Incorrect Tense Usage
Use tenses consistently and logically.
Incorrect
Nowadays, people used smartphones every day.
Correct
Nowadays, people use smartphones every day.
Incorrect
Last year, the government increases taxes.
Correct
Last year, the government increased taxes.
Tense mistakes confuse the timeline of your writing.
8. Overusing Simple Sentences
Very short simple sentences can make essays sound basic.
Weak Example
Technology is important. It helps communication. It improves education.
Better Version
Technology is important because it improves communication and makes education more accessible.
You should aim for a mixture of:
- simple sentences
- compound sentences
- complex sentences
9. Incorrect Word Forms
Incorrect
Pollution is a serious environmental affect.
Correct
Pollution is a serious environmental effect.
Incorrect
This development is very benefit for society.
Correct
This development is very beneficial for society.
Vocabulary mistakes often overlap with grammar problems.
10. Misusing Complex Grammar
Many students try to impress examiners with very advanced structures they cannot control properly.
Weak Example
Although technology improving rapidly because society changing fast.
This sentence is grammatically broken.
Better Version
Although technology is improving rapidly, society still faces several challenges.
Simple but accurate grammar scores much higher.
Why These Mistakes Lower Scores
Frequent grammar errors can:
- reduce clarity
- interrupt communication
- make essays difficult to read
Band 6 essays often contain:
- noticeable grammar mistakes
- awkward structures
- inconsistent accuracy
Band 7+ essays contain:
- fewer errors
- better sentence control
- more accurate complex structures
Accuracy Is More Important Than Complexity
One major misunderstanding is:
“I need very advanced grammar for Band 7 or 8.”
This is not completely true.
Examiners prefer:
- accurate grammar
- natural structures
- controlled sentence variety
A simple accurate sentence is always safer than a complicated incorrect sentence.
How to Improve Your Grammar for IELTS
1. Learn From Your Mistakes
Keep a notebook of:
- grammar errors
- corrected sentences
- common patterns
This is one of the fastest ways to improve.
2. Focus on Frequent Errors
Most students repeat the same grammar mistakes regularly.
Identify:
- article mistakes
- tense mistakes
- singular/plural problems
- sentence structure issues
Target these specifically.
3. Read High-Quality English
Reading helps you notice:
- natural grammar patterns
- sentence structures
- correct collocations
This improves writing subconsciously over time.
4. Practise Editing
After writing:
- check verbs
- check articles
- check plurals
- check punctuation
Careful checking can improve your score significantly.
Final Advice
To improve your IELTS grammar score:
- prioritise accuracy
- avoid grammar you cannot control
- use a mixture of sentence types
- learn from repeated mistakes
- focus on clarity
Remember:
- grammar is about communication
- simple accurate English scores well
- natural writing is better than forced complexity
Strong IELTS essays are clear, controlled, and easy to understand.
Now I suggest you read some of my model essays:
👉 MODEL IELTS ESSAYS
