What are relative clauses?
A relative clause can be used to give additional information about a noun.
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 clause is ‘who smells of slime’. It provides more information about the man. The relative pronoun, ‘who’, is used to connect these clauses in the sentence.