The document discusses the passive voice in English. It notes that the passive voice focuses on the action rather than the subject, and is used when the subject is unknown, unimportant, or to emphasize certain information. Examples of passive voice constructions are provided for different tenses, including the present simple, present continuous, past simple, past continuous, future, and present/past perfect. Special uses of the passive voice in signs, notices, and when emphasizing the person doing the action are also covered.