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[紧急求助]英语语法.被动语态中什么时候要加be动词,什么时候不用加be?要怎样判断?
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都要加的,A is/are (not) done (by B).A is/are (not) going to be done (by B).A will (not) be done (by B).A has/have/had not been done by B.
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第三方登录：英语语法 | 英语中不用被动语态的几种情况
当某件事不是某人主观意愿的时候，通常就会用到被动语态，但是有些动词，其实不可以用被动语态的：
1. 谓语为连系动词时，不用被动语态
He looked fine.
他气色好。
The food tastes delicious.
这食物味道很好。
2.谓语为不及物动词(短语)时，不用被动语态
The war broke out in the end.
战争终于爆发了。
I happened to meet him there.
我碰巧在哪儿见到了他。
3.宾语为不定式、动词的-ing 形式或从句，表示主语的一些想法、爱好或愿望时,一般不用被动语态。
He decided to go with us.
他决定跟我们一起去。
I want to buy a computer.
我想买一台电脑。
4.宾语是相互代词、反身代词、同源宾语等时，一般不用被动语态。
We should help each other.
我们应该相互帮助。
We live a happy life here.
我们在这儿过着幸福的生活。
He thinks of himself too much.
他对自己想得太多。
5.宾语是处所、地点时，一般不用被动语态。
We will reach the station in two hours.
我们再过两个小时就会到站了。
He has gone to London now.
他去伦敦了。
6.谓语部分(动词与宾语) 是一个不可分割的动词短语时，一般不用被动语态。
The ship set sail this morning.
这艘轮船今天早晨起航了。
He saw the doctor yesterday evening.
他昨天晚上看了医生。
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高中英语语法:&被动语态的用法
文章来源莲山课 件 w w w.5y K J.Co m 被动语态的用法&&英语中，大多数情况下用主动语态比较简练、有力。但是，被动语态也有其特殊的用途，它也是表达思想、描述事物的需要。人们通常在下列情况下使用被动语态：&&A. 不知道或不必说出动作的执行者&&How is this word pronounced 这个单词怎么发音？&&Scientists say that work is done whenever a force moves. 科学家们说，力移动时就做了功。&&A greater number of magic English books will be published next year. 明年将有更多的魔法英语书出版。&&After war, everything had been destroyed. 战争结束后，一切都被毁坏了。&&B. 强调动作的承受者&&If you break the school rules, you will be punished. 如果你违反校规，你将受到惩罚。（强调you）&&A new Hope School will be opened in our village. 我们家乡将开办一所新的希望学校。（强调a new Hope School）&&She is liked by everybody. 大家都喜欢她。&&Xiao Li was elected monitor of the class. 小李被选为班长。&&C. 动作的执行者不是人而是无生命的事物&&The bridge was washed away by the flood. 桥被洪水冲走了。 &&We were shocked by the news of his death. 我们听到他的死讯极为震惊。&&Many accidents were caused by careless driving. 许多事故都是开车不小心造成的。&&D. 修辞的需要，为了使句子更加简练、匀称&&He appeared on the stage and was warmly applauded by the audience. 他出现在舞台上，受到了观众的热烈鼓掌。&&The old professor gave a lecture on American history and was well received. 这位老教授作了一个有关美国历史的讲座，受到大家的热烈欢迎。&&I was shown round the school campus by Sean, who had entered the school just a year before. 肖恩带我参观了校园，他去年刚进这所学校。&&E. 为了表示委婉或礼貌，避免提及动作执行者或说话者自己&&You've been told many times not to make the same mistake. 你已被多次告知不要犯同样的错误。&&Everybody is expected to obey the following rules. 希望大家遵守以下规定。&&The control room may not be entered without permission. 非经许可，勿入控制室。&&F. 科技文献中为了客观地描述事情及其过程&&The film is coated with light-sensitive chemicals, which are changed by the different shades and colours of light. 胶卷上涂了一层感光的化学物质，这些物质因光的不同色度与颜色而改变。&&G. 新闻报道中为了体现新闻的客观性&&The west-east gas pipeline project was kicked off on July 4, a big event in the nation's west development campaign. 西气东输工程7月4日全线开工，这是国家西部大开发战略的一件大事。&&H．有些动词习惯上常用被动语态&&He was born in this city.& &他出生在这个城市。&&The school is situated in the suburbs. 这所学校位于郊外。&&注意：&&被动语态中的by短语通常可以省去。但如果by短语是句子的重点所在，或者没有by短语全句的意思不完整时，则要保留by短语。&&The vegetables didn't taste very good. They had been cooked too long. 蔬菜的味道不好，烧的时间太长了。（不需要动作的执行者）&&He arrived at the airport, where he was met by his friend. 他到达了机场并受到朋友的迎接。（没有by his friend，句子的意思不完整）&&Everybody was cast down by such news as that. 大家都被那种消息搞得很沮丧。（需要by短语）第二章 被动语态（二） 三、主动语态变被动语态&&中国人的思维的着眼点在动作的施动者，英美人思维的着眼点在动作的承受者。&&中国人常这样说：I expect you to be there on time. 我希望你准时到那里。&&英美人常这样说：You are expected to be there on time. 希望你准时到那里。&&这就是英语中被动语态的使用比汉语中多的原因。由于英语句子的主动语态结构不同，因而变成被动语态的方式也各不相同。&&A. 主语 + 谓语 + 宾语&&“主语 + 谓语 + 宾语”结构中只有一个宾语，变为被动语态时，将宾语变为主语：&&They will discuss the plan at the meeting. 他们将在会议上讨论这个问题。&&-- The plan will be discussed at the meeting. 这个问题将在会议上讨论。& & & & &&In the past the king possessed great wealth. 过去国王拥有巨大的财富。n& & & & In the past great wealth was possessed by the king. 过去，巨大的财富为国王所拥有。&&B. 主语+谓语+间接宾语+直接宾语&&在这个句型中，谓语动词跟有两个宾语。变成被动语态时，一般将通常指人的间接宾语转化成主语，但有时也可将指物的间接宾语转化成主语：&&We gave the student some books. 我们给了这个学生几本书。&&-- The student was given some books. 这个学生被给了几本书。&&-- Some books were given to the student. 几本书被给了这个学生。&&His father bought him a computer last week. 上周他父亲给他买了一台电脑。&&-- He was bought a computer by his father last week. 上周他父亲给他买了一台电脑。&&-- A computer was bought for him by his father last week. 上周他父亲给他买了一台电脑。&&注意：用直接宾语作被动语态的主语时，通常要在间接宾语前加上适当的介词(如to, for, of等)，以加强间接宾语的语气。&&They awarded him the Nobel Prize. 他们授予他诺贝尔奖。&&-- The Nobel Prize was awarded（to）him. 诺贝尔奖被授予给他。&&The host had caught us some fish. 主人给我们捉了一些鱼。n& & & & Some fish had been caught for us by the host. 主人给我们捉了一些鱼。（for不可省）n& & & & &&C. 主语+谓语+宾语+宾语补足语&&在这个句型中，谓语动词后有一个宾语和一个宾语补足语，变成被动语态时，宾语转化成主语，宾语补足语也随之变为主语补足语：&&All the villagers painted the houses white. 所有村民都把房子涂成了白色。 &&-- The houses were painted white by all the villagers. 房子都被所有的村民都涂成了白色。&&They kept us waiting for a long time. 他们让我们等了很长时间。&&-- We were kept waiting for a long time. 我们等了很长时间。&&We regarded him as the best doctor in town. 我们认为他是城里最好的医生。&&-- He was regarded as the best doctor in town. 他被认为是城里最好的医生。&&注意：&&有些使役动词和感官动词,如make, see, hear, watch, notice, observe, listen to等，在主动结构中跟不带to的动词不定式作宾语补足语，在变为被动结构时，不定式应加上to。&&We heard him say good-bye to his friends. 我们听见他向朋友们道别。n& & & & He was heard to say good-bye to his friends. 他被听到向朋友们道别。n& & & & &&D. 含有情态动词的主动句变被动句&&含有情态动词的谓语变成被动语态时，用“情态动词+ be done”构成。&&情态动词&&cancould& & & & &&maymight&&must&&havehad to&&willwould&&shallshould&&ought to&&主动形式&&cancould do&&maymight do&&must do&&havehad to do&&willwould do&&shallshould do&&ought to do&&被动形式&&cancould be done&&maymight be done&&must be done&&havehad to be done&&willwould be done&&shallshould be done&&nbs[1]&&& 文章来源莲山课 件 w w w.5y K J.Co m
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