主动语态如何改成被动语态？

1、Unit 3 Language in use Language practicePaper and printing have been used for ages.The battery hasnt been changed for a couple of months.Has it been published yet?现在完成时的被动语态现在完成时的被动语态: have/has (not) been +过去分词过去分词Information can be kept on CD-ROMs.Books could only be produced one at a time.Can book

2、s be replaced by computers?情态动词的被动语态情态动词的被动语态: 情态动词情态动词(not)+ be +过去分词过去分词当我们不知道谁是动作的执行者当我们不知道谁是动作的执行者, 或者或者没有必要指出谁是动作的执行者时没有必要指出谁是动作的执行者时, 或或者只需强调动作的承受者时者只需强调动作的承受者时, 要用被动要用被动语态语态。被动语态被动语态:主语主语是动作的是动作的承受者承受者 。Conclusion (一一)一般现在时一般现在时 amis are +动词的过动词的过去分词去分词一般过去时一般过去时 waswere +动词的过去动词的过去分词分词情态动词情态

3、动词 aux.v. (mustcancouldmay + be +动词的过去分词动词的过去分词被动语态的构成：被动语态的构成：be +动词的过去分词动词的过去分词现在进行时现在进行时 be(am、is、are)+being +动词的过去分词动词的过去分词一般将来时一般将来时 will bebe going to be +动词的过去分词动词的过去分词现在完成时现在完成时 havehas +been+动动词的过去分词词的过去分词时态时态被动语态结构被动语态结构一般现在时一般现在时一般过去时一般过去时现在进行时现在进行时过去进行时过去进行时am/is/are +donewas/were+doneam

4、/is/are being+ donewas/were being + done一般将来时一般将来时过去将来时过去将来时现在完成时现在完成时过去完成时过去完成时shall/will be+ donewould be+ donehave/has been+ donehad been+ done主动语态如何改成被动语态？主动语态如何改成被动语态？主动语态的宾语改成被动语态的主语。主动语态的宾语改成被动语态的主语。2. 主动语态的谓语动词改成被动语态的主动语态的谓语动词改成被动语态的谓语动词。谓语动词。dobe done3. 注意保持时态和人称的一致。注意保持时态和人称的一致。 4. 带双宾的谓语动

5、词有两种改法。当把直带双宾的谓语动词有两种改法。当把直接宾语改成主语时，谓语动词后必须加接宾语改成主语时，谓语动词后必须加适当的介词适当的介词: to for.Conclusion (二二)如如: give be given to此类动词还有此类动词还有: pass show send再如再如: buybe bought for此类动词此类动词还有还有: make draw cook mend5. 一些动词不定式在主动语态中省略一些动词不定式在主动语态中省略to作宾语补足语作宾语补足语, 改成被动语态时改成被动语态时, to必必须还原须还原。注注: 1. 不及物动词（不及物动词（vi.)不用被

6、动语态不用被动语态。如如: happen、take place 、appear、disappear1. My uncle gave me a gift on my birthday. 2. We often hear him play the guitarI was given a gift on my birthday. A gift was given to me on my birthday.He is often heard to play the guitar几种特殊结构几种特殊结构注意注意: see, watch, hear, notice, feel, make, listen

7、to, look at等动词等动词/短语短语后作宾语补语的不定式都不带后作宾语补语的不定式都不带to；但改成被动语态后必须带但改成被动语态后必须带to。A recorder is used in our English class every day. Lets practice!recorderEnglish classuse forOften playFootball is played all over the world.A camera is used for taking photos.rob yesterdaysend uplast yearA man-made satellit

8、e was sent up into space last year.A bank was robbed yesterday.must plantcover within a few yearstimeThe tree must be planted on the ground.The ground will be covered with trees in a few years time. send to right nowa tall give soonThey will be sent to the hospital right now.A talk will be given soo

9、n.digThe earth is being dug now.eat up alreadyThe food has been eaten up already.ExercisesComplete the sentences with the correct form of the words.1. I think one day books may _ (place) completely.2. My bike _ (leave) at school, so I have to take the bus to school today.3. The battery _ (charge) ye

10、t. How can I use my recorder.has been lefthasnt been chargedbe placed4. Paper should not _ (throw) away.5. Books and other material can _ (borrow) from the library.6. Ive bought a second-hand MP3 playerand about 1,000 songs have _ (download) onto it!be borrowedbe thrownbeen downloaded7. Has the comp

11、uter _ (repair) yet? I need to write my article with it.8. What have _ (turn on)? The radio.been turned onbeen repairedExercisesComplete the quiz questions and choose the correct answer. Who/ pyramids/ build? Who were the pyramids built by? a) The Egyptians b) The Ancient Greeks c) The Romans 2. Wha

12、t/ use/ to make paper since the 19th century? What was used to make paper since the 19th century? a) Wood b) Silk c) Cotton3. Where/ the story of Romeo and Juliet / set? Where was the story of Romeo and Juliet set? a) In New York b) In Athens c) In London4. where/ the worlds oldest book printed on p

13、aper/ discover? Where was the worlds oldest book printed on paper discovered? a) In India b) In China c) In Egypt5. How long/ computers/ use? How long have computers been used? a) For less than 50 years. b) For 50 years c) For more than 50 yearsExercisesMake questions and write answers.What/ shouldn

14、t /do/with paper? (waste)-What shouldnt be done with paper?-It shouldnt be wasted.1. what/can/use/to make paper? (many things)2. What/ might/use/to replace books one day? (computers)3. how/must/printers/keep? (in good conditions)4. Where/can/music/keep? (on MP3 players)How has the place changed?Use

15、these words:add, change, open, paint,put, turn on, take away,The windowThe capThe lightThe basketballThe sweaterThe paintingTwo chairsThe booksThe disheshave/has beenExercisesComplete the passage with the correct form of the words.From about 500 BC, pens _ for writing. The feathers of large birds_ a

16、nd dried. The point of each feather was sharpened. call, clean, develop, introduce, invent, produce, spread, use, writewere usedwere cleanedThen people used them to write with ink. Many famous works, such as Shakespeares plays, _ with these pens. Then in the 18th century, A pen with a steel writing

17、point _ Only a few words could _, however, before the writer had to fill the pen with ink again.were writtenwas inventedwere producedMany years later, the fountain pen _ from these early pens.In 1950, a European called Laszlo Biro invented the ballpoint pen. The popularity of writing _ quickly with

18、the _ of the ballpoint pen. Even today, ballpoint pen, or Biros, as they _, are much less expensive, compared with the fountain pens.spreadwas developedare calledintroductionExercisesComplete the sentences with the phrases in the box.1. Could you imagine a digital image of Yao Ming on the wall _ a p

19、oster? rather thanby hand, for ages, from now on, I wonder, rather than 2. Things made _ are usually more expensive than those produced in factories.3. _ how old books are actually downloaded onto computers4. I havent seen my best friend _!5. Were using too much paper. _, Im going to read all my magazines online.by handfrom now onfor agesI wonderAround the worldE-bookAs we can send mail by email, we can read books by e-book now. E-books first appeared in the 1990s and have made