Updated on November 11, 2025

Complex Sentences Examples

A complex sentence is a sentence that has one main idea (independent clause) and at least one extra idea (dependent clause) that adds more information. The dependent clause cannot stand alone as a full sentence.

Table of Contents

Exercises

Explanation

Why use them?

  • They let you give more details about time, reason, condition, contrast, and place.

  • They make your writing richer and smoother.

  • You link ideas instead of writing many separate short sentences.

Structure

  • Independent clause = full sentence: I went home.

  • Dependent clause = extra information: because the bus was late.

  • Combine: I went home because the bus was late.

Common Subordinating Conjunctions

These introduce dependent clauses:

Use

Words

Time

when, after, before, while, as soon as

Reason

because, since

Condition

if, unless

Contrast

although, though

Place

where, wherever

Examples

  • Time: When the bell rang, we started class.

  • Reason: He stayed inside because it was raining.

  • Condition: If you study, you will pass the exam.

  • Contrast: Although he is young, he knows a lot.

  • Place: She’ll wait where I told her.

Punctuation Tip

  • If the dependent clause comes first, use a comma:
    Because it was raining, we stayed home.

  • If the independent clause comes first, you don’t need a comma in most cases:
    We stayed home because it was raining.

Difference: Simple vs. Complex

  • Simple sentence: one idea.
    She loves music.

  • Complex sentence: main idea + extra idea.
    She loves music because it relaxes her.

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