IELTS Sentence Structure: How to Fix Run-on Sentences?

March 9, 2026 · Bigyan Kandel
IELTS Sentence Structure: How to Fix Run-on Sentences

In the IELTS Writing exam, many candidates believe that longer sentences automatically lead to a higher score. However, the Grammatical Range and Accuracy (GRA) criteria specifically reward “error-free sentences” and “control of complex structures”.

A “run-on” sentence—one that strings together too many ideas without proper punctuation—is a fast track to a Band 6.0 or lower. This lesson will show you how to maintain “Clause Control” to hit that Band 7+ target.

Mastering Clause Control for Band 7+

To achieve a high score, your writing must be easy to read. If an examiner has to read a sentence twice to understand it, your score will drop.

1. The Problem: The “And-Then” Trap

Many candidates use the word “and” to connect too many ideas. This creates a sentence that lacks focus.

  • ❌ The Run-on: People can grow and eat healthy fruits and vegetables and can stay healthy by using such places and doing gardening in it followed by organic or compost manure without using pesticides and insecticides which can be a healthier option for them.

  • ✔ The Band 9 Fix: People can grow healthy fruits and vegetables in these gardens. By using organic compost instead of chemical pesticides, they can ensure their produce remains a healthy dietary option.

2. The Solution: The “One Sentence, Two Ideas” Rule

A high-scoring essay uses a mix of simple and complex sentences. A good rule of thumb for “Complex” sentences is to limit them to two main ideas connected by a subordinator (like although, because, or which).

Structure Type Example Band Impact
Simple Gardening is a relaxing hobby. Clear, but repetitive.
Complex Although gardening is a relaxing hobby, it requires significant physical effort. High Score (Shows control).
Run-on Gardening is a hobby and it is relaxing and it takes effort and people like it.

Low Score (Lack of control).

3. How to Break Down a Run-on Sentence

If you find yourself writing a sentence longer than three lines, follow these steps:

  1. Find the “Ands”: Identify where you are just adding more information.

  2. Add a Full Stop: Turn the second “and” into a new sentence starting with a transition word like Furthermore, Additionally, or In addition.

  3. Use Relative Clauses: Use “which” or “who” to add detail without starting a new, messy clause.

Let’s play a quiz to find out if you have understood the lesson!

Question 1

Title: Identify the best way to fix this run-on: “The city is becoming overcrowded and the traffic is getting worse and the government should invest in public transport.” Content: * A) The city is becoming overcrowded and the traffic is getting worse, so the government should invest in public transport.

  • B) The city is becoming overcrowded and the traffic is getting worse. Consequently, the government should invest in public transport.

  • C) Because the city is becoming overcrowded and traffic is worsening, the government should invest in public transport.

  • D) Both B and C are correct.

Correct Answer: D

  • Rationale for B: Breaking the sentence into two and using “Consequently” provides clear logic and better flow.

  • Rationale for C: Using “Because” at the start creates a complex sentence that is much more sophisticated than a long list of “ands.”

Question 2

Title: Which of the following is a “Run-on” sentence? Content:

  • A) Although the internet is useful, it can be a distraction for students.

  • B) The internet is useful but it can be a distraction for students who spend too much time on social media.

  • C) The internet is useful it can be a distraction for students and they should be careful.

  • D) None of the above.

Correct Answer: C

  • Rationale for C: This sentence has two independent ideas (“The internet is useful” and “it can be a distraction”) joined without any punctuation or proper linking word.

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