1.145 Joining clauses together: relative pronouns

When a sentence consists of a main clause followed by a relative clause introduced by 'who', 'whom', 'which', or 'that', these words are known as relative pronouns.

Relative pronouns do two things at the same time. Like other pronouns, they refer to somebody or something that has already been mentioned. At the same time they are like conjunctions, because they join clauses together.

For more information about relative clauses, see paragraphs 8.83 to 8.116.