This document discusses the differences between active and passive voice in writing. It defines voice as the form a verb takes to indicate whether the subject performs or receives the action. Active voice indicates the subject performs the action, while passive voice indicates the subject receives the action. The document provides examples of sentences in both active and passive voice and discusses reasons to use each, such as using passive voice when the performer of the action is unknown or unimportant. It also covers the forms of verbs used in passive voice sentences.