The document discusses adjective clauses and their use. It defines clauses, adjective clauses, and dependent clauses. It explains that adjective clauses modify nouns and contain subject or object pronouns like who, which, that to connect the clause to the noun. Examples are provided to illustrate adjective clauses using subject pronouns who, which, that and object pronouns who(m), which, that. The document also covers using the possessive pronoun whose to show possession within an adjective clause. Practice exercises are included to have the reader combine sentences using adjective clauses.