The document discusses the passive voice in English grammar. It explains six situations when the passive voice should be used, including when the subject is more important than the actor, the actor is unknown or unimportant, or for formal or scientific writing. It then provides examples of how to form the passive voice in different English tenses and with verbs that take two objects. The document concludes with examples of the passive voice in subordinate clauses and with gerunds or infinitives.