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Run-ons & Sentence Fragments

A complete sentence must have a subject and a verb to express a complete thought, and punctuation helps connect or separate sentences correctly.

B1Punctuation & Mechanics

What is it

A run-on or sentence fragment is when we haven't made a complete sentence, either by missing a subject or verb, or by connecting two sentences incorrectly.

  • Run-on: when two sentences are joined without proper punctuation, making them hard to understand.
  • Sentence fragment: a group of words that doesn't express a complete thought, often missing a verb or subject.

When to use it

  • We use complete sentences to express a full thought, making our writing clear and easy to follow.
  • Proper punctuation, like commas or periods, helps to separate or connect ideas correctly in our sentences.
  • Avoiding run-ons and fragments helps our writing look polished and professional.

Examples

  • The dog ran quickly.
  • The dog ran quickly, and the cat hid.
  • Because the dog ran quickly, the cat hid.
  • The dog ran quickly; the cat hid.
  • The dog ran quickly. The cat hid.

Common Mistakes

  • Wrong: The dog running quickly. Correct: The dog runs quickly.
  • Wrong: The dog ran quickly, the cat hid. Correct: The dog ran quickly, and the cat hid.
  • Wrong: The dog ran quickly the cat hid. Correct: The dog ran quickly. The cat hid.

Tip

One way to check for run-ons and fragments is to read your writing out loud; if it sounds strange or incomplete, it likely needs fixing.

Quick check
Which of the following is a complete sentence?

Where this matters in your exam

In IELTS Writing Task 2, correct use of punctuation and sentence structure is crucial for coherence and grammar marks, and avoiding run-ons or fragments helps to achieve a higher band score.

  • IELTS Writing Task 2

    Using proper punctuation to separate ideas is key to a well-organized essay in IELTS Writing Task 2.

  • IELTS Writing Task 1

    Avoiding sentence fragments in IELTS Writing Task 1 helps to ensure that the report is clear and easy to follow.