This document provides instructions on forming sentences in the passive voice in English. It explains that the passive voice is used when the subject performing the action is unknown or unimportant. It then provides rules and examples for forming affirmative, short answer, interrogative, and negative sentences in the passive voice using the verb "to be" plus the past participle of the main verb. Examples are given for common sentences like "The tree is made of bills" and questions like "Is the tree made of bills?".