had better be done
ought to be done
(1) am/is / are+及物动词的过去分词 ,体现一般现在时的被动语态
eg.English is spoken in their country.
(2) was/were +及物动词的过去分词 ,体现一般过去时的被动语态
eg.Our school wasn’t built in 1990.
Were the trees planted by him?
(3) will /shall+ 及物动词的过去分词,体现一般将来时的被动语态
eg.A:I shall send my boy to school next September.
P:My boy will be sent to school next september.
(4) would/should +及物动词的过去分词,体现一般过去将来时的被动语态
(5) have/has +been done,体现现在完成时的被动语态
eg.A:We have studied English for nine years.
P:English has been studied for nine years by us.
(6) had + been done,体现过去完成时的被动语态
eg.A:They had produced 100 cars by the end of last year.
P:100 cars had been produced by the end of last year.
带情态动词的被动结构
其形式为：情态动词+be+动词过去式
• Can,could/ will,would/ shall,should/ may,might/ must/ ought to/ need/ have to
