The document discusses the passive voice, including its uses, formation, examples, and how to change sentences from active to passive voice. Specifically, it notes that the passive voice is used when the speaker is unknown or irrelevant, or when discussing general truths or what happens to the subject. It also provides examples of how to form the passive voice using auxiliary verbs like "be" and the past participle, and examples of changing active voice sentences, like "Rebecca makes a cake" to the passive "A cake is made by Rebecca."