1. The passive voice is often used in newspaper reports, headlines, and academic writing. It is used when the subject receives the action rather than performs it. 2. To change a sentence from active to passive, the subject receives the action and it is formed using "to be" plus the past participle of the main verb. 3. The passive voice is used when the doer or agent is unknown, unimportant, impolite to specify, or to focus on the recipient of the action. It is commonly used in instructions, methods, and rules.