Relative clauses are clauses starting with the relative pronouns who, whom, that, which, whose, where, when. They are most often used to define or identify the noun that precedes them.
196 Ask him whether or not he knows the man who is teaching in the other room.
197 The students whom you taught two years ago are here to see you.
198 I would like to see the man whose child you were teaching.
199 I asked him if I could take the books which were on his desk.
200 May I borrow the book which you were reading last night?
201 The man whose car is in the yard is here to repair the chairs whose legs are broken, isn’t he?
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Reference: Mr Hassan Shojaee
Michael Swan: 233, 234, 235