This document discusses the passive voice in English. It explains that the passive is used when the focus is on the object rather than the subject of the sentence. It is often used when the subject or agent performing the action is unknown or unimportant. The document provides examples of active and passive sentences and outlines the formation of the passive voice in various tenses, including using "be" plus the past participle. It notes some common uses of the passive voice, such as in formal writing and when discussing scientific processes.