This document discusses the passive voice in English grammar. It provides examples of active and passive sentences in different tenses, such as present, past, and future. It then explains the meaning and common uses of the passive voice, such as when the agent or "doer" is unknown, unimportant, implied, or when formality or avoiding responsibility is desired. Some reasons for using the passive voice include focusing on the action rather than the actor, and when there is no specific or obvious agent performing the action.