The document discusses the use of passive voice in sentences. It provides examples of changing active voice sentences to passive voice and how the subject, verb, and object change positions. It also discusses different tenses that can be used with passive voice such as simple present, past, future, perfect, and progressive. Additionally, it covers forming passive voice when there are two objects in the active sentence and using impersonal passive with intransitive verbs. Exercises are provided to practice identifying active and passive voice sentences.