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被动语态的基本形式为助动词be + 及物动词的过去分词，即be done。被动语态的不同时态是通过助动词be的时态变化来体现的，其人称和数方面应与主语保持一致。在初中阶段要求掌握八种时态的被动语态和含有情态动词的被动语态，其具体变化为：
一般现在时：am／is／are done
一般过去时：was／were done
现在完成时：have ／has been done
过去完成时：had been done
现在进行时：am／is／are being done
过去进行时：was / were being done
一般将来时：shall ／will be done
过去将来时：should ／would be done
含情态动词：情态动词＋be done
一.被动语态的否定式:在第一个助动词后加not构成。
We don't believe her .变被动
She is not believed by us .
二.被动语态的疑问式：把第一个助动词提到主语之前,句尾加问号构成。
三.带双宾语的两种被动语态形式：
① 把指人的间接宾用作被动句的主语，如：
She gave me a book.→I was given a book by her.
② 把指物的直接宾语用作被动句的主语，此时，间接宾语前需加介词to或for, 如：
She gave me a book. A book was given to me by her.
