This document discusses the passive voice in English grammar. It defines the passive voice and differentiates it from the active voice. The passive voice is used when the object of the sentence is the topic of interest or when the subject performing the action is unknown. The document provides examples of active and passive sentences and explains how to form sentences in the present simple, past simple, and future passive forms using auxiliary verbs like "be", "was", and "will be" plus the past participle of the main verb.