This document provides information about relative clauses, including defining relative clauses, non-defining relative clauses, and the relative pronouns used in each. It defines a relative clause as a group of words that includes a subject and verb and connects two sentences. Relative pronouns like who, whom, which, that, where, whose, and when are used depending on if the relative clause refers to a person, thing, place, possession, or time. Examples are given to illustrate defining vs. non-defining relative clauses and exercises are included for the reader to practice forming relative clauses.