Which of the following sentences uses a relative clause correctly?

The book that I read last night was very interesting.

The book what I read last night was very interesting.

The book which I read last night are very interesting.

The book, that I read last night, was very interesting.

Relative Clauses - English Grammar Rules & Examples

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Relative Clauses - English Grammar Rules & Examples - Practet

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A relative clause is a part of a sentence that gives more information about a noun.

- who/which/that + verb - to describe people or things.
- where/when/why - to give more details about places, times, or reasons.

- We use relative clauses to describe people, things, places, times, or reasons more clearly.
- They help connect ideas in a sentence without repeating information.
- Relative clauses make sentences more interesting and detailed.