This document discusses the uses of different adjective clauses in English. It explains that who is used as the subject pronoun for people, whom is used as the object of a verb for people, which is used for things as the subject and object, whose is used to show possession for people and things, where modifies a place, when modifies a noun of time, and that can replace all the words except whose. Examples are provided to illustrate the proper uses of each adjective clause.