Complex sentences

July 5, 2026
Complex sentences join an independent clause with one or more dependent clauses, showing relationships between ideas and adding detail.
Complex sentences
IELTS Speaking

Complex sentences are sentences that combine an independent clause (a complete idea) with one or more dependent clauses (ideas that cannot stand alone). These clauses are often joined by words like because, although, when, if, or since. Complex sentences help speakers express more detailed, nuanced ideas and show how different pieces of information relate to each other.

Why complex sentences matter in IELTS Speaking

  • IELTS Speaking band descriptors mention the use of a range of grammatical structures, including complex sentences, as a feature of higher-level performance.
  • Using complex sentences demonstrates control of grammar and the ability to express relationships between ideas, which can support a higher band score for Grammatical Range and Accuracy.
  • Overuse of simple sentences may limit your ability to fully answer questions or develop your responses in depth.

Example of a complex sentence

  • Simple: "I enjoy reading. It helps me relax."
  • Complex: "I enjoy reading because it helps me relax."

In the complex example, the word because links the reason to the main idea, showing a clear relationship between the two thoughts. Using such structures in your IELTS Speaking responses can help you communicate more clearly and effectively.

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