<例句>
Such a thing has never been heard of before.
这样的事情以前从来没有听说过。
<语法分析>
带宾语的动词词组，可以由主动语态变为被动语态。双宾动词的两个宾语都可作被动语态的主语，情态动词也可用在被动语态中。含复合宾语的句子在变为被动语态时，只能用宾语不能用补语作被动语态的主语。含宾语从句的复合句一般可变为被动语态，也可用it代替宾语从句作形式主语，变为被动语态。
<触类旁通>
(1) Can this lock be repaired here?
这儿能修这把锁吗?
语法分析：情态动词也可用在被动语态中。
(2) A doctor has been sent for.
已经派人去请医生了。
语法分析：带宾语的动词词组，可以由主动语态变为被动语态。
(3) My sister was given three pencils.
给了我妹妹三支铅笔。
语法分析：双宾动词的两个宾语都可作被动语态的主语。
(4) She was asked when to do the experiment.
有人问她何时做试验。
语法分析：如直接宾语是疑问代词或疑问副词+动词不定式结构时，一般把间接宾语转为被动语态的主语。
(5) I was asked to make her a new evening dress.
她要我给她做一件晚礼服。
语法分析：含复合宾语的句子变为被动语态时，只能用宾语不能用补语作被动语态的主语。
<巩固练习>
(1) The composition must _____[hand] in sometime before Sunday.
(2) These machine's parts may ______[need] in our work.
(3) Should an article _____[use] there?
(4) The job cannot _____[do] by Tom.
(5) It will _____[do] by me.
(6) You shall _____[punish].
(7) Such a thing _____[hear] of before.
(8) A wash _____[give] to the car.
(9) She _____[call] a little girl.
(10) He was found _____[be] a bright pupil.
<参考答案>
(1) be handed (2) be needed (3) be used (4) be done (5) be done (6) be punished (7) has been heard (8) was given (9) was called (10) to be
