8.83 Relative clauses
When you mention someone or something in a sentence, you often want to give further information about them. One way to do this is to use a relative clause.
You put a relative clause immediately after the noun which refers to the person, thing, or group you are talking about.
Relative clauses have a similar function to adjectives, and they are sometimes called adjectival clauses.
Nominal relative clauses, which have a similar function to noun groups, are explained in paragraphs 8.112 to 8.116.