- Form: "to be" (am, is, are, was, were, has been, have been, had been, will be, etc.) + past participle.
- Subject: The agent might not be mentioned or comes after "by."
- Tense: Depends on the tense of the "to be" verb.
- Object: Active voice object becomes passive voice subject.
- Transformation: Identify object, make it subject, use "to be" + past participle, optionally add agent with "by."