被动语态讲解
被动语态的讲解
2.情态动词的被动语态：3.一般过去时的被动语态：4.一般将来时的被动语态：5.现在进行时的被动语态：6.过去进行时的被动语态：7.现在完成时的被动语态：8.过去完成时的被动语态：9.过去将来时的被动语态：被动语态全解语态是动词的一种形式, 表示句子中主语和谓语动词的关系, 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。
只有及物动词才能用于被动语态。
被动语态的时态：1. 一般现在时的被动语态：am /is/ are + 动词的过去分词情态动词+ be +动词的过去分词was /were + 动词的过去分词will be + 动词的过去分词am /is /are +doing +动词的过去分词was/were+doing+ 动词的过去分词have /has +been + 动词的过去分词had+been + 动词的过去分词would/should+be+ 动词的过去分词二．被动语态的基本用法:(1) 需要强调动作的承受者时The Great Wall is enjoyed by millions of people all over the world English is widely spoken in the world now.(2) 不知道或没必要指出动作的执行者时Mr. Wang is invited to the meeting today .The problem is dealt with now .(3) 当说话人需要强调客观时It is said that she was a beauty when she was young . 三．主动语态变被动语态的变法：口诀：宾变主，主变宾，谓变be done , 时不变，数格必须随被变。
注：1.主动、被动的时态要一致。
2. 主动、被动的句式要一致。
3. 变成的被动语态的主语与谓语在单复数上保持一致。
四、语态转换不被动语态的步骤1, 把原主动句中的宾语转换为被动语态的主语2, 把动词改为被动语态形式即"be+ 过去分词"。
被动语态知识点讲解(更全面,思路清晰)
被动语态知识点讲解(更全面,思路清晰)被动语态知识点讲解被动语态是英语语法中的重要概念之一，它在句子中常常用来强调动作的接受者或者对象。
在本文中，我们将详细介绍被动语态的用法和结构，并提供一些实例用以帮助读者更好地理解和运用被动语态。
一、什么是被动语态被动语态是指句子的主语是动作的接受者或对象，而动作的执行者成为句子的宾语或介词短语。
被动语态使用助动词“be”加上动词的过去分词形式构成。
二、被动语态的结构根据被动语态的不同时态，其结构会有些许变化。
下面我们将一一介绍几种常见时态的被动语态结构：1. 一般现在时态：被动语态的一般现在时结构为：[be(am/is/are)] + [过去分词] + [by + 主语执行者]示例：1) 主动句：She writes a book.被动句：A book is written by her.2) 主动句：They make delicious cakes.被动句：Delicious cakes are made by them.2. 现在进行时态：被动语态的现在进行时结构为：[be(am/is/are)] + [being] + [过去分词] + [by + 主语执行者]示例：1) 主动句：He is washing the car.被动句：The car is being washed by him.2) 主动句：They are building a house.被动句：A house is being built by them.3. 一般过去时态：被动语态的一般过去时结构为：[be(was/were)] + [过去分词] + [by + 主语执行者]示例：1) 主动句：She bought a new car.被动句：A new car was bought by her.2) 主动句：They painted the wall.被动句：The wall was painted by them.4. 过去进行时态：被动语态的过去进行时结构为：[be(was/were)] + [being] + [过去分词] + [by + 主语执行者]示例：1) 主动句：He was cleaning the house.被动句：The house was being cleaned by him.2) 主动句：They were repairing the car.被动句：The car was being repaired by them.三、被动语态的用法被动语态的使用可以有多种情况，下面是几个常见的用法：1. 强调行为的接受者：被动语态可以强调动作的接受者或者对象，使其在句子中得到突出。
英语被动语态讲解
一、被动语态的构成形式
2. 被动语态的特殊结构形式
1)带情态动词的被动结构。其形式为：情态动词＋ be＋过去分词。 The baby should be taken good care of by the baby-sitter.
2) 有些动词可以有两个宾语，在用于被动结构时， 可以把主动结构中的一个宾语变为主语， 另一宾 语仍然保留在谓语后面。通常变为主语的是间接宾 语。 His mother gave him a present for his birthday.
态和完成时态) 。 I don't like being laughed at in the public.
二、被动语态的各种句型
1.单宾语结构。
Our English teacher often uses a taperecorder in teaching English.我们英语老师经 常用录音机教英语。（主动语态）
The children must be taken good care of . 这些孩子必须得到好的照顾。
The big fire has been put out . 大火已被 扑灭。
三、 It is said that+从句及其他类似 句型
一些表示“据说”或“相信”的动词如believe, consider, expect, report, say, suppose, think等可 以用于句型“It＋be＋过去分词＋that从句”或“主 语＋be＋过去分词＋to do sth.”。有：
It is said that… 据说, It is reported that…据报道， It is believed that…大家相信， It is hoped that…大家希望， It is well known that…众所周知 It is thought that…大家认为， It is suggested that…据建议。
被动语态讲解
过去时被动语态
构成方式
be动词的过去式（ was/were）+过去分词
用法
表示过去的动作，强调动 作承受者
例句
The window was broken by the boy.（窗户被那个 男孩打破了。）
将来时被动语态
构成方式
01
will be+过去分词
用法
02
表示将来的动作，强调动作承受者
例句
将主动句中的动词变 为被动形式（be + 过去分词）。
保留原句主语作为by短语出现情况
当需要强调动作的执行者时， 可以保留原句主语作为by短语 出现。
当被动句的主语是泛指或不明 确时，可以保留原句主语作为 by短语来明确动作的执行者。
当需要对比主动句和被动句时 ，可以保留原句主语作为by短 语来保持句子的一致性。
03
不要过度使用被动语态 ，以免导致句子显得生 硬、不自然。
04
在某些情况下，主动语 态和被动语态可交替使 用，以达到不同的表达 效果。
04 被动语态转换技 巧及实例分析
将主动句转换为被动句方法论述
找出主动句中的宾语 ，将其作为被动句的 主语。
将主动句的主语作为 被动句的by短语出现 ，或者省略by短语。
过去分词是动词的一种形式，用于 表示动作的完成或被动。在被动语 态中，过去分词与助动词be一起 构成谓语。
主语
被动语态中的主语通常是动作的承 受者，而不是执行者。主语可以是
名词、代词、数词等。
宾语（可选）
在某些情况下，被动语态中也可以 包含宾语，用于进一步说明动作的 对象或结果。但宾语不是被动语态
的必要成分。
被动语态讲解
目 录
被动语态知识点讲解
被动语态知识点讲解一．基本结构1.一般现在时的被动语态结构：is/am/are+过去分词E.g.①The boy is looked after by his father. 这个小孩由他父亲照顾。
2.一般过去时的被动语态结构：was/were+过去分词E.g.①The cup was broken by Tom. 这个杯子是被汤姆打破的。
3.一般将来时的被动语态结构：will+be+过去分词E.g.①They will be allowed to go to school. 他们将会被允许去上学。
4.现在完成时的被动语态结构：has/have+been+过去分词E.g.①The battery hasn’t been charged for a couple of months. 电池好几个月没有充电了5.情态动词的被动语态结构：情态动词+be+过去分词E.g.①Today information can be received online. 现在，信息可以从网上接收到。
二．标志词1.一般现在时：usually，always，sometimes，often，every短语，never等。
2.一般过去时：ago, yesterday, the day before yesterday, last 短语, in +年, just now, at the age of , one day, once upona time, then, on that day等。
3.一般将来时：tomorrow，the day after tomorrow ，next短语in the future 等。
4.现在完成时：already，yet，just，before，since，for，ever，never，so far等。
5.情态动词：can, may, must, could, might, shall , should, will, would, need等。
被动语态的讲法
被动语态的讲法
被动语态（Passive Voice）是英语语法中的一种形式，它表示主语是动作的接受者而不是动作的执行者。
在被动语态中，谓语动词使用被动形式，即“be + 过去分词”。
被动语态的构成：
被动语态由助动词“be”的适当形式（现在时、过去时、将来时等）加上动词的过去分词构成。
具体形式如下：现在时：am/is/are + 过去分词
过去时：was/were + 过去分词
将来时：will be + 过去分词
使用被动语态的情况：
当动作的接受者比动作的执行者更重要时，通常使用被动语态。
例如：
1. The book was written by the author.（这本书是由作者写的。
）
2. The building will be constructed next year.（这座大楼将于明年建成。
）
注意，在被动语态中，主语通常是动作的接受者，而不是执行者。
例如，“The book was written by the author”表示“书是由作者写的”，而不是“作者写了书”。
转换主动语态到被动语态：
要将主动语态转换为被动语态，需要将谓语动词变为被动形式，并将宾语变为主语。
例如：
主动语态：The author wrote the book.（作者写了这本书。
）
被动语态：The book was written by the author.（这本书是由作者写的。
）。
被动语态详解
被动语态详解被动语态是英语中常用的一种语态形式，通过它可以强调动作的承受者与执行者的关系，使句子更加灵活和富有变化。
在英语中，被动语态由be动词（am/is/are/was/were）+过去分词构成。
本文将详细讲解被动语态的用法及相关注意事项。
一、被动语态的基本结构1. 一般现在时的被动语态：肯定句：主语 + am/is/are + 过去分词否定句：主语 + am/is/are + not + 过去分词疑问句：Am/Is/Are + 主语 + 过去分词？2. 一般过去时的被动语态：肯定句：主语 + was/were + 过去分词否定句：主语 + was/were + not + 过去分词疑问句：Was/Were + 主语 + 过去分词？3. 一般将来时的被动语态：肯定句：主语 + will be + 过去分词否定句：主语 + will not be + 过去分词疑问句：Will + 主语 + be + 过去分词？二、被动语态的用法1. 强调动作的承受者：主动语态：Tom wrote a letter.（汤姆写了一封信。
）被动语态：A letter was written by Tom.（一封信被汤姆写了。
）2. 当不知道或不关心动作的执行者时：主动语态：Someone broke the window.（有人打破了窗户。
）被动语态：The window was broken.（窗户被打破了。
）3. 当动作的执行者为明显的、普遍的或不需要具体指出时：主动语态：People speak English all over the world.（世界各地的人都说英语。
）被动语态：English is spoken all over the world.（英语在世界各地都被说着。
）4. 相应的介词有些动词后面需要与特定的介词连用，在被动语态中需要保留这些介词。
主动语态：They laughed at the man.（他们嘲笑那个人。
被动语态（讲解）
被动语态1：英语中语态有两种：主动语态和被动语态。
语态的作⽤：语态是动词的⼀种形式，⽤来说明主语和谓语之间的关系。
语态的选⽤：如果主语是动作的执⾏者，谓语⽤主动语态。
例如：We clean the room every day.如果主语是动作的承受者，或者说是动作的对象，谓语则是要⽤被动语态。
例如：The room is cleaned every day.2:被动语态的各种形式1) am/is/are +doneeg：I'm asked to take care of myself.eg：Football is played all over the world.2）has /have been doneeg：This book has been translated into many foreign languages.eg：The prices of many goods have been cut again .3）am/is /are being doneeg：A road is being built around the mountain.eg：Many new houses are being built in this city.4） was/were doneeg1：This house was built in 1958.eg2：His leg was broken in an accident.5） had been doneeg1：A new school had been set up by the end of last year.eg2：When the anthem had been played the conference began.6) was/were being doneeg1： meeting was being held when I was there.eg2：We were being trained this time last year.7) shall/will be doneeg1：More factories will be built in our city.eg2：He will be taken to hospital tomorrow.8) shall/will have been doneeg1：The project will have been completed before July.eg2：Your clothes shall have been made for you soon.9) should/would be doneeg1：He told me that his new cloths would be made by his mother.10) should/would have been doneeg1：He told me that his new clothes would have been made very soon.3:主动形式表⽰被动意义1）及物动词的不及物⽤法：主语通常是物，且有着某种内在的特点。
(完整)被动语态讲解
被动语态讲解一、总述:英语动词有两种语态，即主动语态（The Active Voice)和被动语态（The Passive Voice)。
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。
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、被动语态的形式1) 常用时态的被动语态的构成:被动语态的基本形式为助动词be + 及物动词的过去分词，即be done。
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.以give 为例，列表如下：一般现在时：am / is / are + given一般过去时：was / were +given一般将来时：shall / will +be+ given过去进行时：was / were + being + given现在进行时：am / is / are + being + given过去完成时：had + been + given现在完成时：have / has + been + given将来完成时：shall / will + have been + given过去将来时： should / would +be+ given现在完成进行时：have/has been being done含情态动词的被动语态：情态动词＋be done［注]被动语态没有将来进行时和过去将来进行时.2）被动语态的否定式：在第一个助动词后加not构成.Russian is not taught in our school. 我们学校不教俄语。
3)被动语态的疑问式：把第一个助动词提到主语之前,句尾加问号构成。
被动语态的用法讲解
被动语态的用法讲解一、什么是被动语态被动语态是英语中一种常用的句式结构，它强调主语受到动作的影响或承受了某种行为。
在被动语态中，主动词的对象变成了句子的主语，而原来的主语则变成了介词by短语中使用。
被动语态特别适用于当我们不知道或者不关心谁执行了动作时。
二、构造被动语态被动语态由“be”（根据时态和人称变化）+过去分词构成。
下面是各种时态下的例子：1. 一般现在时：am/is/are + 过去分词主动：She eats an apple.被动：An apple is eaten by her.2. 一般过去时：was/were + 过去分词主动：They opened the door.被动：The door was opened by them.3. 一般将来时：will be + 过去分词主动：He will write a book.被动：A book will be written by him.4. 现在完成时：has/have been + 过去分词主动：We have finished the project.被动：The project has been finished by us.5. 现在进行时：am/is/are being + 过去分词主动：She is reading a book.被动：A book is being read by her.6. 过去进行时：was/were being + 过去分词主动：They were painting the house.被动：The house was being painted by them.三、被动语态的用法1. 强调行为受害者被动语态用于突出行为或事件的受害者，使其成为句子的重点。
例如：主动：The dog bit John.被动：John was bitten by the dog.在这个例子中，主语从"dog"变成了"John"，强调了John受到了咬伤。
被动语态讲解及注意事项
被动语态讲解及注意事项被动语态是英语中一种常用的句型结构，它用于强调动作的承受者或接受者，而不是动作的执行者。
当主语是动作的执行者时，使用主动语态；当主语是动作的承受者或接受者时，使用被动语态。
被动语态的构成：被动语态的构成是由“助动词be + 及物动词的过去分词形式（be + past participle）”组成。
be动词根据句子的时态和人称来变换。
被动语态的示例：主动语态：He eats an apple.被动语态：An apple is eaten by him.主动语态：They will build the house.被动语态：The house will be built by them.主动语态：She has written a book.被动语态：A book has been written by her.被动语态的注意事项：1.当主动语态的句子中有宾语时，宾语变成被动语态的主语，而主语则成为被动语态中的介词短语。
例如：主动语态：She is eating an apple.被动语态：An apple is being eaten by her.注意：主动语态中的宾语“an apple”变成了被动语态中的主语，“she”则成为了被动语态中的介词短语“by her”。
2. 当主动语态的句子中没有宾语时，用“by + 主语”来表示动作的执行者。
例如：主动语态：He sings well.被动语态：Well is sung by him.注意：原句中没有宾语，所以被动语态中使用“by + 主语”来表示动作的执行者。
3.若主动语态中的动词是不及物动词，则不能使用被动语态。
例如：主动语态：He sleeps.被动语态：错误，不能用被动语态。
4. 根据句子的时态，使用相应的be动词形式。
下面是be动词在不同时态和人称下的变化：一般现在时：am/is/are一般过去时：was/were一般将来时：will be现在进行时：am/is/are being过去进行时：was/were being现在完成时：has/have been过去完成时：had been5.注意主动语态中的时态、人称和数量与被动语态中的时态、人称和数量的一致性。
被动语态讲解
2、表示“发生、进行”的不及物动词和短语，如：happen, take place, occur, last, break out, come out, come about, come true, run out, give out, turn out等以主动形式表示被动意义。
How do the newspapers come out? 这些报纸是如何引出来的呢？3、表示感受、感官的联系动词feel, sound, taste, look, feel等在主系表结构中常以主动形式表示被动意义。
Your reason sounds reasonable.（二）非谓语动词（动名词和不定式）的主动形式表被动意义1、在need，want，require, bear等词的后面，动名词用主动形式表示被动意义。
The house needs repairing（= to be repaired）．这房子需要修理。
2、形容词worth+动名词的主动形式表示被动含义；而worthy+动词不定式的被动形式。
The picture-book is well worth reading．= The picture-book is very worthy to be read．3、动词不定式在名词后面作定语，不定式和名词之间有动宾关系时，又和句中另一名词或代词构成主谓关系,不定式的主动形式表示被动含义。
I have a lot of things to do this afternoon．(to do与things是动宾关系，与I是主谓关系。
)试比较：I’ll go to the post office. Do you have a letter to be posted? (此处用不定式的被动语态作定语表明you不是post动作的执行者。
)4、在某些“形容词+不定式”做表语或宾语补足语的结构中，句子的主语或宾语又是动词不定式的逻辑宾语时，这时常用不定式的主动形式表达被动意义。
被动语态语法讲解
被动语态语法讲解(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。
以give 为例，列表如下：一般现在时：am / is / are + done 一般过去时：was / were + done一般将来时：shall / will + be done 一般过去将来时：should / would + be done现在进行时：am / is / are + being + done 过去进行时：was / were + being + done现在完成时：have / has + been + done 过去完成时：had + been + done将来完成时：shall / will + have been + done 过去将来完成时：should / would + have been + done ［注］被动语态没有将来进行时和过去将来进行时。
(三)常见的八种时态中的被动语态1. 一般现在时：(1)People grow rice in the south of the country. Rice is grown in the south of the country.(2)The school doesn't allow us to enter lab without a teacher. We are not allowed to enter lab without a teacher. 2. 一般过去时：(1)They agreed on building a new car factory last month. a new car building factory was agreed on last month.(2)The students didn't forget his lessons easily. His lessons were not easily forgotten3. 一般将来时：(1)They will send cars abroad by sea. Cars will be sent abroad by sea.(2)They will give plenty of jobs to school-leavers. Plenty of jobs will be given to school-leavers.5. 现在进行时：(1)The radio is broadcasting English lessons. English lessons are being broadcasted on the radio.(2) We are painting the rooms. The rooms are being painted.6. 过去进行时：(1)The workers were mending the road. The road was being mended.(2)This time last year we were planting trees here. Trees were being planted here this time last year.7. 现在完成时：(1)Someone has told me the meeting might be put off.I have been told the meeting might be put off.(2)He has brought his book here. His book has been brought here.(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。
被动语态讲解
九年级上
一、语态概述
（1）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。巧记为：主动、主动、主去动。 例如：Many people speak English. 谓语：speak的动作是由主语many people来执行的。
The bikes are made?by them?in the factory.
歌诀是：宾变主，主变宾，by短语后面跟。
谓语动词变被动，be+“过分”来使用。
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
歌诀是：情态动词变动，情态加be加“过分”，原 We can repair this watch in two days. This watch can be repaired in two days. You ought to take it away. It ought to be taken away. They should do it at once. It should be done at once.
一般将来时：will／shall be＋taught 现在进行时：am／is／are being＋taught 过去进行时：have／has been＋taught 现在完成时：have／has been＋taught 歌诀是：被动语态be字变，过去分词跟后面。
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。
This book was written by him.这本书是他写的。
Eight hours per day for sleep must be guaranteed.每天8小时睡眠必须得到保 歌诀：谁做的动作不知道，说出谁做的没有必要； 动作承受者需强调，被动语态运用到。
被动语态讲解
被动语态一、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。
被动语态的时态变化只改变be 的形式，过去分词部分不变。
疑问式和否定式的变化也如此。
1.特殊疑问句（疑问词+一般疑问句）How often is your classroom cleaned?What are knives used for?2.When was the new shop built last year?B. Our bikes were stolen outside the movie theater.Where were your bikes stolen?3.A. A new hospital will be built in our city.Will a new hospital be built in our city?What will be built in our city?B. A million trees will be planted next year.Will a million trees be planted next year?How many trees will be planted next year?4.A. Uncle Wang is mending my bike now.→ My bike is being repaired by Uncle Wang now.Is your bike being repaired by Uncle Wang now?Who is your bike being repaired by now?By whom is your bike being repaired now?B. They are planting trees over there.→ Trees are being planted over there by them.Are trees being planted over there by them?5.A. People have translated this book into many languages.→This book has been translated into many languages.Has this book been translated into many languages?B. Many countries have sent up many man-made satellites into space.→Many man-made satellites have been sent up into space by many countries.Have many man-made satellites been sent up into space by many countries?C. Jane has helped this kid for ten years.→This kid has been helped by Jane for ten years.Has this kid been helped by Jane for ten years?How long has this kid been helped by Jane?6. 其时态及句型的变化仅由情态动词完成，“be+过去分词”部分不变A.We must water young trees often.→Young trees must be watered often.Must young trees be watered often?B.You should correct your mistakes right now.Your mistakes should be corrected right now.Should my mistakes be corrected right now?C.You can hand in your homework tomorrow.Your homework can be handed in tomorrow.Can my homework be handed in tomorrow?二、主动语态变为被动语态的注意事项（1）含有双宾语，即直接宾语和间接宾语的句子，每个宾语都可变为被动语态的主语，即其被动语态有两种形式。
被动语态讲解
被动语态讲解语态：是动词的一种形式，用来表明主语与谓语动词之间的关系。
主动语态：表示主语是（谓语）动作的执行者。
谓语动词为主动语态的句子叫主动句。
被动语态：表示主语是（谓语）动作的承受者。
谓语动词为被动语态的句子叫被动句。
被动语态是动词的一种特殊形式，一般说来，只有需要动作对象的及物动词才有被动语态。
汉语往往用"被"、"受"、"给"等词来表示被动意义。
如：He opened the door. 他打开了这扇门。
（主动语态）The door was opened. 这扇门被打开了。
（被动语态）.He cleans the room every day .The room is cleaned by him every day ..Tom mended the car just now .The car was mended by Tom just now .一、被动语态的谓语构成形式：“be + 过去分词”1. 被动语态的基本时态变化：. be随时态的变化而变化，被动语态谓语部分的第一个助动词为主要助动词可用来帮助构成否定句和疑问句。
1) 一般现在时：am/is/are +done (过去分词) (am/is/are为助动词)例The room is cleaned every day . (肯定，否定，一般疑问，特殊疑问，反意疑问)--- The room is not cleaned every day .---Is the room cleaned every day ? No, it isn’t . Yes , it is .---How often is the room cleaned ?---The room is cleaned every day , isn’t it ?---The room is not cleaned every day , is it ?（I am given a gift on my birthday each year .The rooms are painted every two years .This song is often sung by children .孩子们常唱这首歌。
被动语态讲解
一、什么是被动语态?英语中时态很多，但语态不多，只有两种，即：主动语态和被动语态。
所谓“被动语态”，相当于中文中常说的“被……”、“由……”的句式，如：“他的自行车被偷了。
”，“这座楼房是由他们建造的。
”二、被动语态的结构His bicycle was stolen. The building has been built in 2000.通过上面的例句，可以看出，“被动语态”的构成是：be + 过去分词+ (by+动作执行者)三、被动语态的运用什么情况下要用被动语态呢?一般地说，有下面几种情况：(1) 不知道谁是动作的执行者或没有必要。
例如：Paper is made from wood. (纸是由木材生产出来的。
)The house is quite old. It was built in 1950. (这座房子太旧了。
它是1950年建成的。
)He was wounded in the fight. (他在战斗在受伤了。
)Electricity is used to run machines. (电是用来开动机器的。
)(2) 需要强调动作的对象时。
例如：Calculator can't be used in the maths exam.(计算器不能用于数学考试。
)He was awarded first prize in that contest.(他在比赛中获得了第一。
)(3)为了使语气婉转，避免提到是谁做的这件事。
例如：The construction of the new lab must be completed by the end of next month. (新实验室必须在下个月底前完工。
)四、各种时态的被动语态举例一般地讲，被动语态可用于英语的各种时态。
为了能准确地运用被动语态，重点是要掌握be动词的各种时态变化。
各种时态的被动语态举例如下：1、一般现在时的被动语态. am / is / are + 动词的过去分词Our classroom is cleaned every day. This car is made in China.2、一般过去式的被动语态: was / were + 动词的过去分词His desk was cleaned just now. The station was built in 1928.3、现在进行时的被动语态: am / is / are + being + 动词的过去分词A new factory is being built in our city now. Some trees are being cut down in the park.4、过去进行时的被动语态: was / were + being + 动词的过去分词A new factory was being built in our city at that time.Some babies were being looked after by Miss Chen last year.5、一般将来时的被动语态:(A) will / shall + be + 动词的过去分词(B) am / is / are + going to be +动词的过去分词.Some new factories will be built in our city this year.Your watch is going to be mended in an hour.6、过去将来时的被动语态: (1).would / should + be + 动词的过去分词(2).was / were +going to be + 动词的过去分词.She said that some new factories would be built soon in our city.He thought that your watch was going to be mended after an hour.7、现在完成时的被动语态:have / has + been + 动词的过去分词Some new factories have been built in the city since last year.Your watch has been mended already.8、过去完成时的被动语态:had + been + 动词的过去分词He said that some new factories had been built in the city.9、含情态动词的被动式：can/may/must + be + done例如：He can not be found. / I must be paid for this.五、熟记结构被动语态的结构为“助动词be+及物动词的过去分词(p.p)”。
被动语态讲解
被动语态讲解被动语态的结构是：助动词be+及物动词的过去分词。
是动词的一种形式，用以说明主语与谓语动词之间的关系。
eg. Saddam is being tried. 萨达姆正在接受审判。
被动语态时态变化只改变be的形式，过去分词不变。
(一)举例Saddam is being tried. 萨达姆正在接受审判。
The Iraqi government is trying Saddam. 伊拉克政府正在审判萨达姆。
More and more people use computers now.(主动语态)Computers are more and more widely used now.(被动语态)English is spoken all over the world. (被动语态)(二)英汉两种语言在表达被动方式上的差异汉语表达被动语态非常简单明了，用被遭受等词来表示，如被捕、被杀、受到凌辱等。
而英语表达被动的方式也不复杂，用助动词be+动词的过去分词表示。
其中助动词be有人称、数量和时态的变化，而这正是英语被动语态的难点。
(三)被动语态的构成被动语态由be+及物动词的过去分词构成。
这里要强调一定是及物动词的过去分词，因为不及物动词不能带宾语，也就不可能有被动语态。
英语主动语态有16个时态;被动语态常用的有8个，以give为例说明如下：时态动词形式一般现在时Am/is/are given一般过去时Was/were given一般将来时Shall/will be given现在进行时Am/is/are being given过去进行时Was/were being given过去将来时Should/would be given现在完成时Has/have been given过去完成时Had been given被动语态的疑问句是将第一个助动词移到主语之前、句末用问号;否定式是在第一个助动词后加not或never等其他否定词、句末用句号。
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被动语态注意问题
⑴含有使役动词（make /let /have）或感官动词（hear ,see, listen to ,look at ,find ,watch, feel等）的句子，在主动语态中这些词后常跟不带to的动词不定式，但是在改成被动语态时，则一定要把省去的to再加上去，另外help这一个词在主动语态中后面的动词不定式可以带to,也可不带to, 但在被动语态中也必须把to加上去。
例：①Mother often makes me do homework.
→I am often made to do homework by mother.
⑵teach ,give ,pass ,show ,buy, tell等动词常常带有两个宾语（双宾语：直接宾语和间接宾语），改为被动语态时，两个宾语可以选其中任一个作主语。
如果直接宾语被提前作主语，那么间接宾语（一般是人）前要加相应的介词to/for。
例：
①She gave me a book.= She gave a pen to book.
→I was given a book by her.
→A book was given to me by her.
②My father bought me a MP3.= My father bought a MP3 for me.
→I was bought a MP3 by my father.
→A MP3 was bought for me by my father.
[3]含有宾语补足语的句子改为变动语态。
（宾补放在原来位置不变）
例：①We call him Xiao Ming.
主谓宾宾补
→Ｈe is called Xiao Ming by us.
②He found the novel very interesting.
→The novel was found very interesting by him.
[4] 没有被动语态的动词：
1. 没有被动语态的词，表示状态或特征的及物动词如cost, fit, have, suit等没有被动形式，另外，像happen = take place, break out(爆发)，break down(坏了)。