The document discusses the active and passive voice in English grammar. It provides examples of sentences in the active voice and their equivalent passive transformations. Some key points covered include:
- The passive voice is used when the object is more important than the subject or the subject is unknown.
- To form the passive, the verb is changed to a form of "be" plus the past participle and "by" plus the original subject.
- Adverbs are placed before the verb in the passive form.
- The passive can be used with imperatives by using "let" plus the verb.
- Certain subjects like "we" and "people" don't require "by" in the passive form.