Relative pronouns introduce a relative clause. They include who for people, that and which for things, when for time, and whose to show possession. Relative clauses belong to one of two categories ...

They are introduced by a relative pronoun like 'that', 'which', 'who', 'whose', 'where' and 'when'. For example: I won’t stand by the man who smells of slime. In this example, the relative ...