被动句的主语实际上是主动句的宾语，主动句变为被动句时，主语往往被省略。

　　We asked the teacher to explain the difficult sentences again.-The teacher was asked to explain the difficult sentences again.

　　I found a poor girl lying on the ground.-The poor girl was found lying on the ground.

　　My mother bought me a pair of new shoes.-I was bought a pair of new shoes； -A pair of new shoes was bought for me.

　　When we came to the theatre， we found all the seats occupied.-When we came to the theatre， all the seats were found occupied.

　　They paint their houses white in spring.-Their houses are painted white in spring.

　　The people in the town recognize him as a genius.-He is recognized as a genius by the people in the town.

　　有些动词，如let， make， hear， see， watch， notice， have（让，使）， feel 等，在主动语态中，其后面的不定式作宾语补足语时to 被省略，但在被动语态中需将to表达出来。在被动语态中，如果一个简单句中有两个动词，后一动词一定要加to.

　　I saw him turn round the corner.-He was seen to turn round the corner.

　　The teacher made the students copy the sentences many times until they could make sentences themselves.-The students were made to copy the sentences many times until they could make sentences themselves.

　　含有被动意义的主动语态：

　　（1）某些连系动词，如smell， taste， sound， prove， feel.

　　The flowers smell sweet.

　　The food tastes nice.

　　（2） 某些与can’t， won’t 等连用的不及物动词， 如move， lock， shut， open.

　　It can’t move.（不能说 It can’t be moved.）

　　The door won’t shut.

　　（3） 某些可和well， easily等副词连用的不及物动词，如read， write， wash， clean， draw， burn， cook.

　　The cloth washes well.

　　The poem reads smoothly.

　　The meat is cooking.

　　动词的语态部分主要应掌握被动语态的基本用法及其在不同的时态中的表现形式。

　　1、It remains a question when the new classroom building _________.

　　A. will be completed B. had been completed

　　C. would be completed D. has been completed

　　（答案 A）

　　2、My mother knows Jane； they _____ to each other at a party.

　　A. have been introduced B. are introduced

　　C. were introduced D. had been introduced

　　（主动语态：introduce sb. to sb.）

　　（答案 C）

　　被动语态部分还须特别注意动词make， hear， see等词，其后面用动词不定式作补足语时，to 应该保留。

　　Those who won’t work should be made to work.

　　The teacher was made to give up his teaching because of poor health.（give up 放弃；health 名词；healthy 形容词；breath 名词；breathe 动词）

　　1、In modern times， great female chefs have become known， and some of the best cook books _______ by women.

　　A. have written B. are written C. were written D. have been written

　　答案 D

　　2、________ a new shopping center will be built here next year.

　　A. He is said B. It has said C. It is said C. It says

　　It is said that 据说

　　答案 C

　　3、New ideas sometimes have to wait for years before they _______ fully.

　　A. accept B. receive C. are accepted D. are received

　　they 指代new ideas

　　receive：1.收到别人给予的东西，不含收件人是否愿意接受之义。

　　I received a letter from a good friend of mine yesterday.

　　2.也可表示“得到”， “领受”，“遭受”之意。

　　The book was favorably received by the public.

　　Accept： “收到”，强调主观意愿决定“接受”，“收授”。而receive只表示收到，不一定接受。

　　She received a gift from him， but did not accept it.

　　receive 与 accept 在表示赞成某一看法，意见时可以换用。

　　The moral code is now received / accepted by all.

　　答案 C

　　4、In some parks visitors _________ to keep off the grass.

　　A. request B. requests C. are requested D. is requested

　　keep off 远离

　　答案 C

　　5、He remembered ________ to the zoo by his father when he was little.

　　A. taking B. being taken C. to have taken D. have been taken

　　remeber doing 记得过去做的事情

　　答案 B

　　6、English ________ in a new way at my college in the past few years.

　　A. has been teaching B. was being taught

　　C. has been taught D. had been taught

　　in the past few years 近几年。现在完成时

　　答案 C

　　7、All the machines _______ next month.

　　A. will be repaired B. will repair

　　C. will have repaired D. will have repair

　　被动语态必不可少的时系动词be

　　答案 A

　　8、The rooms were then empty and most of them _______.

　　A. have shut up B. had shut up

　　C. have been shut up D. had been shut up

　　答案 D

　　9、When they had finished playing， the children were made _______ all the toys they had taken out.

　　A. put away B. to put away

　　C. putting away D. be put away

　　put away 将某物收起来，放入箱子或抽屉

　　答案 B

　　分析句子首先要判断主语能不能发出谓语的动作，如果不能发出动作，就选择被动语态，然后再考虑不同的时态。