Final answer:
To change active to passive, place the object at the beginning, followed by the verb, subject, and appropriate auxiliary verb and participle. To change active sentences to passive, the object of the active sentence becomes the subject of the passive sentence, and the subject of the active sentence moves to a prepositional phrase or is omitted.
Step-by-step explanation:
To change a sentence from active to passive, you need to identify the subject and the object of the active sentence. Then, place the object at the beginning of the passive sentence, followed by the verb and the subject. Finally, add the auxiliary verb 'be' and the past participle of the main verb. For example:
- The students are taught by the professor.
- The entire stretch of highway was paved by the crew.
- The house will be cleaned every day by me.
- The students' questions are always answered by the teacher.
- The office is vacuumed and dusted every night by their cleaning crew.
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