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Clause Types (Simple/Compound/Complex)

Clauses are groups of words with a subject and verb, and come in three types: simple, compound, and complex.

B1Sentence Structure

Rule

A clause is a group of words with a subject and a verb. There are three main types of clauses: simple, compound, and complex.

Rule

    • Simple clause: One independent clause. For example: I go to school.
    • Compound clause: Two or more independent clauses joined with 'and', 'but', or 'or'. For example: I go to school and I study hard.
    • Complex clause: An independent clause and one or more dependent clauses. For example: I go to school because I want to learn.

Usage

    • We use simple clauses for short, clear statements.
    • We use compound clauses to connect two equal ideas.
    • We use complex clauses to show relationships between ideas.

Examples

  • I eat breakfast.
  • I go to school and I study hard.
  • I go to school because I want to learn.
  • Although I was tired, I went to the party.
  • If it rains, I will take an umbrella.
  • The book, which is on the table, is mine.

Common Mistakes

  • Wrong: I go to school and study hard. Correct: I go to school and I study hard.
  • Wrong: Because I was tired but I went to the party. Correct: Although I was tired, I went to the party.
  • Wrong: The book which on the table is mine. Correct: The book, which is on the table, is mine.

Tip

Think of clauses like building blocks: simple clauses are single blocks, compound clauses are blocks joined together, and complex clauses are blocks with smaller blocks attached.

Quick check
Which of the following sentences is a complex sentence?

Where this matters in your exam

Assessed in Writing Task 2 for clear expression.

  • Writing Task 2

    Use complex sentences to express ideas clearly.