Relative clauses

We can use relative clauses to join two English sentences, or to give more information about something.

I bought a new car. It is very fast.
→ I bought a new car that is very fast.

She lives in New York. She likes living in New York.
→ She lives in New York, which she likes.

Defining relative clauses:

1: The relative pronoun is the subject:

First, let's consider when the relative pronoun is the subject of a defining relative clause.

We can use 'who', 'which' or 'that'. We use 'who' for people and 'which' for things. We can use 'that' for people or things.

The relative clause can come after the subject or the object of the sentence. We can't drop the relative pronoun.

For example (clause after the object of the sentence):

• I'm looking for a secretary who / that can use a computer well.
• She has a son who / that is a doctor.
• We bought a house which / that is 200 years old.
• I sent a letter which / that arrived three weeks later.