The document discusses the passive voice in English, including its formation, main uses, and semantic features. It covers passive verb forms, verbs that cannot be used passively, sentences using objects such as clauses or infinitives, object complements, and the uses of "get". It also discusses how the meaning of passives can vary depending on the lexical verb and types of passive constructions including agentive, non-agentive, reflexive, durative, and quasi-passives.