The document discusses passive voice and its uses. Passive voice is formed using the verb "to be" plus the past participle. It provides examples of passive voice in different tenses. The passive voice is used when the agent performing the action is unknown, unimportant, or obvious from context. It is also commonly used in formal notices and signs.
![The verb to be + past participle. ,[object Object],[object Object],[object Object]](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)