The document discusses the passive voice and provides examples of how to change sentences from active to passive voice. The passive voice focuses on the action rather than the subject. It can sometimes be more polite than the active voice. To change a sentence to the passive voice, the object of the active sentence becomes the subject of the passive sentence, the finite verb is changed to "be" plus the past participle, and the subject of the active sentence may become the object of the passive sentence or be dropped. Several examples are given to illustrate changing between active and passive voice.