被动语态的用法我很不了解，高手门讲一讲

英语语法被动语态我一直不理解不会用 有没有什么技巧，我不知道该咋变~

英语中的被动语态使用得比汉语要多，要普遍，许多课本乃至实际应用中都常常涉及到这个问题。一般说来，当强调动作承受者，不必说出执行者或含糊不清的执行者时，多用被动式。须注意的是，许多地方与汉语不同。注意那些汉语中没有"被……"的意思，英语却用被动态。还要注意，英语的被动态往往由"by"引出，而有用介词"by"的短语往往又不是被动态，而是系表结构。还有些待殊现象，如…knownto man(人类......所知)，on foot步行(美国人有时用by foot)，in carraige(乘四轮马车)等等。还有假主动，真被动的十几个常用词的用法，以及so heavy to carry而不用so heavy to be carried等习惯用法。有关这类情况，做到心中有数对全面掌握被动态，准确无误地解答习题非常关键，被动态必须涉及的是动词的各种时态变化的问题。英语的时态本来很复杂，怎样记住各自的被动形式呢? 首先要明确"将来进行无被动，现在完成进行
同"。这两种时态无被动形式。
另外，不及物动词带有同源宾语的动词，反身代词的动词和系动词都无被动形式。即便如此，还有一般现谑保?话愎?ナ保?衷诮?惺保??ソ?惺保?衷谕瓿墒焙凸?ネ瓿墒?还有不定式，动名词，分词，以及它们的复合结构)的被动态，再加上情态动词，助动词以及它们的疑问式和否定式从中掺杂，真是令人头痛，眼花缭乱。下面口诀就以动词do为例，即do did过去式done过去分词，以口诀形式总结各种时态的被动态，一定对你有所启示。
被动语态的口决

一般现、过用be done，be有人称、时、数变。
完成时态have done，被动将been加中间。
一般将来shall (will) do，被动变do为be done。
将来进行无被动，shall (will) be doing,
现在完成进行同，have (has) been doing。
现、过进行be doing, 被动be加being done。
情、助、有、是妥安排，一律随新主语变。
否定助后加not，疑问一助置主前。
主语恰是疑问词，直陈语序主在前。
一般情助加be done，双宾多将间宾变。
复合宾语宾变主，宾补、主补相应变。

第二句"be有人称、时、数变"即be有人称、时态和单、复数的变化。"情助"是指情态动词和助动词must, may, can, shall, will等一律随新主语(多是主动句中的宾语)来变化。"疑问一助置主前"是说有两个助动词的话，应把主语放在第一助动词之后或把第一助动词置于主语之前。下面详细举例说明之。

一般现、过用be done, be有人称、时、数变
例：主动：The children gave the foreign guests a warm welcome.
被动：The foreign guests were given a warm welcome by the children.
孩子们热烈地欢迎外宾。
主动：People regard him as brilliant.
被动：He is regarded as brilliant by people.
人们认为他很有才华。
以上两例都是一般时态用be done的例子，be有人称、时、数变，第三人称foreign friends是复数，时态一般过去时，所以"be done"就是were given，而People regard him as brilliant一句，被动后的"be done"就变成单数第三人称is regarded的形式了。
被动: This speech was delivered by comrade Wang. (was delivered即一般过去时的被动态)
这篇讲演是王的发言。
There was a serious train accident near the border. Two people were killed and twelve were injured.
边境发生严重列车事故，二人死亡，十二人受伤。
A person who is truly honest is called a straight arrow. 直言不讳的人才是真正诚实的人。
A note was passed up to the speaker. 有人给讲演者递上来一张纸条。
John was elected president of the class instead of Harry. 乔治被选为班长而代替了亨利。
Volcanoes are described as active, dormant or extinct. 火山被描述为活的，沉睡着的，或者死的。
The soldier was killed, but the train was saved. 这位战士牺牲了，然而列车得救了。
He was thought to be clever but dishonest. 他被认为很聪明但不诚实。
The first zoological garden in the United States was established in 1874. 美国的第一个动物园是1874年建立的。
Families were often broken up; wives were taken away from their husbands, and children from their parents. 家庭被拆散，妻儿被夺走。
The information is urgently needed. 急需这个资料。
Most environmental problems exist because adequate measures for preventing them were not taken in the past. 多数环境污染问题的存在，是因为过去没有采取适当的保护措施。

完成时态have done，被动将been加中间。
(过去完成时had done也包括在内)。
例：主动：We have studied English for 3 years off and on at the spare-time school.
被动：English has been studied for 3 years off and on at the spare-time school. (have随新主语变为has)
我们已经在夜校里断断续续地学了三年英语了。
主动: They had produced 100 tractors by the end of last year.
被动: 100 tractors had been produced by the end of last year.
到去年年底我们已生产出一百台拖拉机。
主动：They have set up a power station in their home town.
被动：A power station has been set up in their home town.
他们的家乡建立了一座发电站。
主动：They have warned us to be careful of rats.
被动：We have been warned to be careful of rats.
他们已提醒我们要注意老鼠。
主动：People have piled plastic bags full of rubbish in streets.
被动: Plastic bags full of rubbish have been piled in streets.
人们把装满垃圾的塑料袋子堆放在街上。
主动：We have used nuclear energy to produce ekectricity.
被动：Nuclear energy has been used to produce electricity.
核能已用来发电。
主动: No one has ever beaten him at tennis.
被动：He has never been beaten at tennis.
就网球来说还没有人是他的对手。
(No one涉及到全否定和部分否定问题，见否定一讲)
The person who owns the gun may try to deny that he has used it. But anyone seeing the smoke knows the gun has just been fired.
有枪的人会极力否认他开了枪。但是任何看到枪姻(枪冒的烟)的人都会知道刚才开了枪。
Today is Cilia's wedding day, she has just been married to Danel. 今天是西丽亚的新婚日，她刚刚和丹尼尔结婚。
The subject of these lectures have been announced by the lecture committee. 演讲委员会已宣布了这些讲演的题目。
过去完成时也是一样：
主动: Somenody had cleaned my shoes.
被动: My shoes had been cleaned by somebody.
有人早已把我的鞋子擦了。
When I returned I found that they had towed (toud) my car away, I asked why they had done this and they told me that id was because I had parked it under a "No Parking Sign".
被动：...my car had been towed away. I asked why this had been done and told that ... it had been parked under a "No Parking Sign".
当我回来时，发现我的车被弄走了。我问他们为啥这么于。他们告诉我说因为我把车于停在"禁止停车"的禁区。
主动: They had build three ships by last December.
被动: By last December three ships had been build by them.
到去年年底他们已建造了三艘船。
Research had been centred on the improvement of natural building materials before synthetics were created. 合成材料造出之前，研究工作集中在改进天然建筑材料上。
He did not say if all those steel pipes had been examined. 他并没有说那些钢管都检验过没有。
After plastic had been created, engineers were given a much wide choice of materials. 塑料发明之后，工程师们在材料选择上有了更广阔的途径。

一般将来shall (will) do，被动变do为be done
即由shall do或will do变为shall done或will be done。
例：主动: We shall build several big modern power plants in our city next year.
被动：Several big modern power plants will be built in our city next year.
过年我市将建立几座大型现代化的发电厂。
(shall do中的shall要随新主语变为will, do为be done.)
王动：I shall send my second boy to school next September.
被动：My second boy will be sent to school next September.
过年九月我将送我次子去读书。
主动：In order to fool people cheaps and swindlers will make such bricks out of lead covering the "lead brick" with gold.
被动：Such bricks will be made out of lead covering the "lead brick" with gold by cheaps and swindlers.
设法骗钱的商人和骗子们将通过把"铅砖"外面镀上一层金来做这样的"金砖"。
主动：They will ask you a lot of strange questions.
被动: You will be asked a lot of strange questions.
他们将问你许多怪题。
被动句中的by引出的宾语，一般说来，如果是人称代词你、我、他等，均可省略，some one no one不由by来引出。如果是名词不能省略，但当今英语也都可省略了。
主动：The Chinese people will make more space explorations in the future.
被动：More space explorations will be made in the future by the Chinese people.
中国人民在将来将进行更多的空间探索。
同样
After a period of use, the batteries should be shanged. 电池使用一段时间后，应该更换。
Usually, the electricity is on for 24 hours. But tomorrow it will be cut off in the day time. 通常是昼夜供电，明天白天将停电。
More peaceful uses will be found for nuclear explosives in the future. 在将来会发现更多的和平利用核爆炸的途径。
More hard work will be needed to make this wonder come true in a short time from now. 从现在起要使这些奇迹在短时间内成为现实还需要做更多的艰苦工作。
make...come true 使……成为事实; come true做宾补(见感使动词口诀)。
The machine will not be used again. 这机器不能再用了。
Will more gas be needed? 需要更多的煤气吗?
但如果是一般过去将来时如何处理呢？请记下面口诀：
一般过去将来时，过去某时将发生。
主动should (would) do，被动be done代原形。
将来进行无被动，现在完成进行同。
主动：A few days ago we were still not quite sure whether we should carry out the new plan ahead of time.
被动：...whether the new plan would be carried out ahead of time.
几天前，我们还不能肯定能否提前执行新的计划。
主动：I did not say that we would change the eauipment.
被动：I did not say that the equipment would be changed.
我并没说过，我们将换掉那台设备。
主动：My supervisor told me that he would give me a special tutorial a few days ago.
被动：My supervisor told me that a special tutorial would be given to me a few days ago.
几天前，我的导师说他将对我进行个别辅导。
主动: I never thought that be would bring me the information so early.
被动：I never thought that the information would be brought to me so early.
我决没想到他那么早就会把资料带给我。

将来进行无被动，shall (will) be doing,
现在完成进行同．have (has) been doing,
即将来进行时表示动作在将来某一时刻或某个阶段正在进行'现在完成进行时表示某-行为发生在过去．延续到现在，可能还要延续下去。两种时态则不用被动语态。
例；We hope your comany will soon be sending an engineer over to check this equipment. (将来进行时) 我们希望贵公司早些派一名工程师来检查这台设备。
In a ffew minutes our passenger plane will be flying in the stratosphere. (将来进行时) 几分钟后我们的客机将在同温层中飞行。
We hope scientists will be tapping new energy sources to meet the need for power. 我们希望科学家们将发掘新的能源来满足能量的需要。(将来进行时)
What will you be doing this evening? 今晚你将做什么?（将来进行时)
I have been living in Anshan Since 1980．(现在完成进行时) 1980年以来，我一直住在鞍山。
How long have you been studying English? 你学英语多久了?(现在完成进行时)
We have been waiting at the airport for the whole day becayse of the thick fog. 由于大雾，我们已经在机场等了一整天了。 (现在完成进行时)
Since then, applied mathematicians have been coping successfully with many problems in astronony. 从那时以来，应用数学家成功地处理了许多天文学上的问题。
(现在完成进行时)以上均无被动态。

现、过进行be doing，被动be加being done
即现在进行时或过去进行时都是be的人称、时和数的形式加doing。而被动态则是be加上being done的形式，being是不变的。现在进行时和过去进行时的被动态是被动态个的重点，容易搞错。例如：
主动：The workers are repairing the main building of the Northeast Engineering Institute.
被动：The main building of the Northeast Engineering Institute is being repaired by the workers.
工人们正在维修东北工学院主楼。
Two reserviors are being built at the same time. 两座水库同时建造。
The nasty question is being considered by the committee members. 委员会的委员们正在考虑那个棘手的问题，
A cir(uit d朗i8ni 566inf m6J6bythetR8Incers． 工程师们正搞电路设计。
Equipment and foodstuffs are being flown to the floodstricken areas. 设备和食品正在空运到灾区。
The buildong of another fly-over is being planned. 他们在计划修建另一座跨线桥。
We coudld not get through because the February 19th Road was being repaired. 我们过不去，因二.一九路正维修呢。

一、语态概述

英语的语态是通过动词形式的变化表现出来的。英语中有两种语态：主动语态和被动语态。
主动语态表示主语是动作的执行者。
例如：Many people speak Chinese.
谓语：speak的动作是由主语many people来执行的。
被动语态表示主语是动作的承受者，即行为动作的对象。例如：Chinese is spoken by many people.主语English是动词speak的承受者。


二、被动语态的构成
被动语态由"助动词be＋及物动词的过去分词"构成。人称、数和时态的变化是通过be的变化表现出来的。现以speak为例说明被动语态在各种时态中的构成。
一般现在时：am／is／are＋spoken
一般过去时：was／were＋spoken
一般将来时：will／shall be＋spoken
现在进行时：am／is／are being＋spoken
过去进行时：was/were being＋spoken
现在完成时：have／has been＋spoken
过去完成时：had been + spoken
三、被动语态的用法
(1)不知道或没有必要说明动作的执行者是谁。
例如：Some new computers were stolen last night. 一些新电脑在昨晚被盗了。(不知道电脑是谁偷的)
This bridge was founded in 1981.这座桥竣工于1981年。
(2)强调动作的承受者，而不强调动作的执行者。
例如：The glass was broken by Mike.玻璃杯是迈克打破的。
This book was written by him.这本书是他写的。
Your homework must be finished on time.你们的家庭作业必须及时完成。
四、主动语态变被动语态的方法
(1)把主动语态的宾语变为被动语态的主语。
(2)把谓语变成被动结构(be＋过去分词) (根据被动语态句子里的主语的人称和数，以及原来主动语态句子中动词的时态来决定be的形式)。
(3)把主动语态中的主语放在介词by之后作宾语，将主格改为宾格。例如：
All the people laughed at him.
He was laughed at by all people.
They make the bikes in the factory.
The bikes are made by them in the factory.
He cut down a tree.
A tree was cut down by him.
五、含有情态动词的被动语态
含有情态动词的主动句变成被动句时，由"情态动词＋be＋过去分词"构成，原来带to的情态动词变成被动语态后"to"仍要保留。
We can repair this watch in two days.
This watch can be repaired in two days.
They should do it at once.
It should be done at once.
六、特殊情况

1.He made the boy work for two hours yesterday.

The boy was made to work by him for two hours yesterday.

2.Mother never lets me watch TV .

I am never let to watch TV by mother.

3.Jack gave Peter a Christmas present just now.

(1)A Christmas present was given to Peter by Jack just now.

(2)Peter was given a Christmas present by Jack just now.

被动语态详解

（一） 语态分类
英语动词有两种语态，主动语态和被动语态。主动语态表示主语是动作的执行者，被动语态表示主语是动作的承受者。如：
They will build a new bridge over the river. （主动）
A new bridge will be built over the river. （被动）
汉语中常用“被”、“给”、“由”、“受”等词用来表示被动，而英语用：助动词be+ 及物动词的过去分词构成。
（二）被动语态的时态、人称和数的变化
主要体现在be的变化上，其形式与系动词be的变化形式完全一样。
1） 一般现在时: am/is /are + done
2） 一般过去时: was/ were + done
3） 一般将来时: will（shall）/am/is /are going to + be + done
4） 过去将来时: would（should）/was/were going to + be + done.
5） 现在进行时: am/is/are + being done.
6） 过去进行时: was/were + being + done
7） 现在完成时: have/has + been + done
8） 过去完成时: had + been + done.
〔注〕被动语态没有将来进行时和过去将来进行时。
（三）被动语态常用的八种时态
1. 一般现在时： am/is /are + done
People grow rice in the south of the states.
�Rice is grown in the south of the states.
The school doesn't allow us to enter the chemistry lab without a teacher.
�We are not allowed to enter the chemistry lab without a teacher.
2. 一般过去时： was/ were + done
They agreed on the building of a new car factory last month.
�The building of a new car factory was agreed on last month.
He had a strange way of making his classes lively and interesting.
And the students didn't forget his lessons easily.
�He had a strange way of making his classes lively and his lessons were not easily forgotten.
3. 一般将来时：will（shall）/am/is /are going to +be+done
They will send cars abroad by sea.
�Cars will be sent abroad by sea.
They will give plenty of jobs to school-leavers.
�Plenty of jobs will be given to school-leavers.
4. 过去将来时：would（should）/was/were going to + be + done
The manager said they would complete the project by the end of the year.
�The manager said the project would be completed by the end of the year.
The workers told me they would mend the car as soon as possible.
�The workers told me that the car would be mended as soon as possible.
5. 现在进行时：am/is/are + being done
The radio is broadcasting English lessons.
We are painting the rooms.
The rooms are being painted.
6. 过去进行：时was/were + being + done
The workers were mending the road.
�The road was being mended.
This time last year we were planting trees here.
�Trees were being planted here this time last year.
7. 现在完成时： have/has + been + done
Someone has told me the sports meet might be put off.
�I have been told the sports meet might be put off.
We have brought down the price.
�The price has been brought down.
8. 过去完成时： had + been + done
When I got to the theatre, I found they had already sold out the tickets.
�When I got to the theatre, I found the tickets had already been sold out.
People had considered him to be a great leader.
�He had been considered to be a great leader.
（四）含有情态动词的被动语态
含有情态动词的被动语态是由“情态动词+ be+ 及物动词的过去分词”构成。
The teacher said, “You must hand in your compositions after class. ”
�The teacher said, “Your compositions must be handed in after class. ”
He can write a great many letters with the computer.
�A great many letters can be written with the computer by him.
（五）被动语态的使用
1. 当不知道或没有必要指出动作的执行者时，常用被动语态，这时往往不用by短语。
“Mr. White, the cup with mixture was broken after class. ”（只是告诉老师杯子坏了，不知是谁弄坏的，或不想说出谁弄坏的）。
2. 突出或强调动作的承受者，如果需要说出动作的执行者，用by短语。
These records were made by John Denver.
The cup was broken by Paul.
3. 当汉语句子的主语既不是动作的执行者，也不是动作的承受者时，这时常用in+ 名词作状语，而代替by短语。
These cars were made in China.
15, 000 cars will be produced each year in the new factory.
（六）主动语态变被动语态的方法
1. 把主动语态的宾语变成被动语态的主语。
2. 把主动语态的谓语变成被动语态的be+ 过去分词，时态要与原句保持一致。
3. 把主动语态的主语变为介词by的宾语，放在被动语态里谓语动词之后，by短语可以省略。如果原句主语是地点名词，在被动语态中用in+ 地点名词作状语。如：
My aunt invited me to her dinner party.
主语 谓语 宾语
I was invited（by my aunt）to her dinner party.
主语 谓语 宾语
The school set up a special class to help poor readers.
A special class to help poor readers was set up in the school.
（七）语态转换时所注意的问题
1. 把主动语态变为被动语态时，其谓语动词的时态要与原句时态保持一致，其谓语动词的数要与新主语保持一致。
We have bought a new computer.
�A new computer has been bought. （正确）
A new computer have been bought. （错误）
2. 含有双宾语的主动句变被动句时，可分别将其中的一个宾语变为主语，另一个不动，一般变间接宾语为主语时比较多。
My uncle gave me a present on my birthday.
I was given a present on my birthday.
如果把直接宾语（指物）改为主语，则在间接宾语（指人）前加适当的介词，如上句还可以说：
A present was given to me yesterday.
注意：一般在下列动词后，常在间接宾语前用介词to，如：
bring, give, hand, lend, offer, pass, pay, promise, sell, show, take, teach, tell等。
The magazine was passed on to me.
The cup with mixture was showed to the class.
My bike was lent to her.
一般在下列动词后，间接宾语前用介词for, 如：
build, buy, cook, cut, choose, do, fetch, find, fix, get, keep, make, order, paint, play, sing等。
Mother made me a new skirt.
A new skirt was made for me.
The meat was cooked for us.
Some country music was played for us.
有些既不用to也不用for, 根据动词与介词的搭配关系。
He ask me a question.
A question was asked of me.
People all over the world know the Great Wall.
The Great Wall is known to people all over the world. （不用by短语）
3. 由动词+ 介词或副词构成的短语动词，要把它们作为整体看，即把它们看成一个及物动词，介词或副词不可拆开或漏掉。这类动词有：
不及物动词+ 介词，如: agree to, ask for, laugh at, operated on, listen to, look after, think of, talk about等。
The patient is being operated on.
The problem is solved. It needn't be talked about.
及物动词+ 副词：如：bring about, carry out, find out, give up, hand in, make out, pass on, point out, put away, put off, think over, turn down, work out, turn out等。
His request was turned down.
The sports meet will be put off because of the bad weather.
4. 带复合宾语（宾语+ 宾补）的动词改为被动语态时，一般把主动结构中的宾语改为主语，而宾语补足语保留在谓语动词后面。如：
We always keep the classroom clean.
The classroom is always kept clean.
She told us to follow her instructions.
�We were told to follow her instructions.
注意：在see, watch, hear, notice, listen to, look at, make, feel等动词后作宾语补足语的动词不定式都不带to，但改成被动语态后都带to，这时不定式为主语补足语，也就是说不定式作主语补足语不存在省略to的问题。
We often hear him play the guitar.
He is often heard to play the guitar.
The earthquake made the road fall onto another one below.
The road was made to fall onto another one below by the earthquake.
注意：带有复合宾语的句子，如果宾语补足语是名词，变被动句时，应将宾语变为主语，不要误把宾语补足语的名词作主语。如：
Tomatoes were first taken back to Europe and people called them love apples.
误：Love apples were called them.
正：They were called love apples.
5. 还有一种短语动词由动词+ 名词+ 介词构成，变被动语态有两种形式，如下：
1）We take good care of the books.
�The books are taken good care of.
Good care is taken of the book.
2）You must pay attention to your pronunciation.
Attention must be paid to your pronunciation.
Your pronunciation must be paid attention to.
用于这类结构的短语动词常见的有：catch sight of, make use of, pay attention to, set fire to, take care of, take hold of, take notice of, keep an eye on等。
6. 当主动句的主语是nobody, no one等含有否定意义的不定代词时，被动句中将其变为anybody, 作by的宾语，并将谓语动词变为否定的被动语态。如：
Nobody can answer this question.
误：The question can be answered by nobody.
正：The question can not be answered by anybody.
7. 当否定句中的宾语是anything, anybody, anyone等不定代词时，在被动句中应将其分别变为nothing, nobody, no one作主语，并将谓语动词变为肯定的被动语态。如：
They haven't done anything to make the river clean.
�误：Anything hasn't been done to make the river clean.
正：Nothing has been done to make the river clean.
8. 以who为主语开头的疑问句，变被动时，用by whom放在句首：
Who wrote the story?
�误：Who was the story written?
正：By whom was the story written?
9. 有些动词既是及物又是不及物，当它们和well, badly, easily等副词连用时，表示主语内在品质或性能，是不及物动词，用主动表示被动，这时不用被动语态，常见的有：write, read, clean, sell, wash, cook等。如：
The cloth washes easily. 这布很好洗。
The new product sells well. 这新产品很畅销。
The pen writes smoothly. 这支笔写字很流畅。
The books sell well. （主动句）
对比：
The books were sold out. （被动句）
The meat didn't cook well. （主动句）
对比：
The meat was cooked for a long time over low heat. （被动句）
10. 下列情况主动句不能改为被动句：
第一，感官系动词一般用主动形式表示被动意义，如：feel，look, seem, taste, sound, remain等。
——Do you like the material?
——Yes, it feels very soft.
误：It is felt very soft.
The food tastes delicious.
误：The food is tasted delicious.
The pop music sounds beautiful.
误：The pop music is sounded beautiful.
第二，谓语是及物动词leave, enter, reach, suit, have, benefit, lack, own等。如：
He entered the room and got his book.
� 误：The room was entered and his book was got.
She had her hand burned.
误：Her hand was had burned.
第三，一些不及物动词短语没有被动语态，如：take place, break out, belong to, lose heart, consist of, add up to等。如：
The fire broke out in the capital building.
误：The fire was broke out in the capital building.
第四，不及物动词没有被动语态，如：rise, happen, succeed, remain, lie等。
1）When we got to the top of the mountain, the sun had already risen.
误：The sun had already been risen.
2）After the earthquake, few houses remained.
�误：After the earthquake, few houses were remained.
第五，宾语是反身代词，相互代词，同源宾语，不定式，v-ing形式及抽象名词等，不能变为被动句子的主语，如：
I taught myself English.
�误：Myself was taught English.
We love each other.
�误：Each other is loved.
11. 汉语有一类句子不出现主语，在英语中一般可用被动结构表示，如：
据说……It is said that…
据报导……It is reported that…
据推测……It is supposed that…
希望……It is hoped that…
众所周知……It is well known that…
普遍认为……It is generally considered that…
有人建议……It is suggested that…
1）It is reported that it is going to rain tomorrow.
2）It is well known that Thomas Edison invented the electric lamp.
在英语语言中，被动语态是极常见的语言现象，人们进行语言交际，离不开对被动语态的使用，熟练掌握被动语态也为下一步学习打下良好的基础，在动词-ing形式，不定式等结构中，都有被动式，都需要运用被动语态的知识去理解。

被动语态（一般现在时）
主动语态变被动语态时，主动语态句中的宾语变成被动语态句中的主语，主动语态句中的主语成为被动语态句中的动作的发出者。
被动语态的口诀
一般现、过用be done，be有人称、时、数变。
完成时态have done，被动将been加中间。
一般将来shall (will) do，被动变do为be done。
将来进行无被动，shall (will) be doing,
现在完成进行同，have (has) been doing。
现、过进行be doing, 被动be加being done。
情、助、有、是妥安排，一律随新主语变。
否定助后加not，疑问一助置主前。
主语恰是疑问词，直陈语序主在前。
一般情助加be done，双宾多将间宾变。
复合宾语宾变主，宾补、主补相应变。
1） 一般现在时: am/is /are + done
2） 一般过去时: was/ were + done
3） 一般将来时: will（shall）/am/is /are going to + be + done
4） 过去将来时: would（should）/was/were going to + be + done.
5） 现在进行时: am/is/are + being done.
6） 过去进行时: was/were + being + done
7） 现在完成时: have/has + been + done
8） 过去完成时: had + been + done.
〔注〕被动语态没有将来进行时和过去将来进行时。

例：1、主动：The children gave the foreign guests a warm welcome.
被动：The foreign guests were given a warm welcome by the children.
孩子们热烈地欢迎外宾。
2、主动：People regard him as brilliant.
被动：He is regarded as brilliant by people

简单说来，就是be done
主语要是物，或者人
Mobile phones were used to connect with each other
I was told that it wasn't woth troble.

在难一点就是非谓语从句，省去was
I saw a beautiful buiding buit by workers.

be+过去分词

twerh

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