Passive Voice Grammar

The document discusses the passive voice and how it differs from the active voice. Specifically, it notes that: 1) The passive voice is used when the subject of the sentence is not as important as the object, and allows omitting the agent performing the action. 2) To form the passive voice, the verb changes to a form of "to be" plus the past participle of the main verb, and the subject and object swap places. 3) There are various reasons to use the passive voice, such as when the agent is unknown or unimportant to the meaning of the sentence.