【精品PPT】现在完成时的被动语态.ppt

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1、,外研版 初三(上)Module 4,Unit 3 Language in use,Language practice,Paper 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:have/has(not)been+过去分词,Information can be kept on CD-ROMs.Books could only be produced one at a time.Can

2、books be replaced by computers?,情态动词的被动语态:情态动词(not)+be+过去分词,当我们不知道谁是动作的执行者,或者没有必要指出谁是动作的执行者时,或者只需强调动作的承受者时,要用被动语态。被动语态:主语是动作的承受者。,Conclusion(一),一般现在时 amis are+动词的过去分词一般过去时 waswere+动词的过去分词情态动词 aux.v.(mustcancouldmay+be+动词的过去分词,被动语态的构成：be+动词的过去分词,现在进行时 be(am、is、are)+being+动词的过去分词一般将来时 will bebe going

3、to be+动词的过去分词现在完成时 havehas+been+动词的过去分词,am/is/are+done,was/were+done,am/is/are being+done,was/were being+done,shall/will be+done,would be+done,have/has been+done,had been+done,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。2.主动语态的谓语动词改成被动语态的谓语动词。dobe done3.注意保持时态和人称的一致。4.带双宾的谓语动词有两种改法。当把直接宾语改成主语时，谓语动词后必须加适当的介词:to f

4、or.,Conclusion(二),如:give be given to此类动词还有:pass show send再如:buybe bought for此类动词还有:make draw cook mend,5.一些动词不定式在主动语态中省略to作宾语补足语,改成被动语态时,to必须还原。注:1.不及物动词（vi.)不用被动语态。如:happen、take place、appear、disappear,1.My uncle gave me a gift on my birthday.2.We often hear him play the guitar,I was given a gift on

5、 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,注意:see,watch,hear,notice,feel,make,listen to,look at等动词/短语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to。,A recorder is used in our English class every day.,Lets practice!,recorderEnglish class,use for,Often play,Football

6、is played all over the world.,A camera is used for taking photos.,rob yesterday,A man-made satellite was sent up into space last year.,A bank was robbed yesterday.,must plant,cover with,in a few yearstime,The tree must be planted on the ground.,The ground will be covered with trees in a few years ti

7、me.,a tall give soon,They will be sent to the hospital right now.,A talk will be given soon.,dig,The earth is being dug now.,The food has been eaten up already.,Exercises,Complete the sentences with the correct form of the words.,1.I think one day books may _(place)completely.2.My bike _(leave)at sc

8、hool,so I have to take the bus to school today.3.The battery _(charge)yet.How can I use my recorder.,has been left,hasnt been charged,be placed,4.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 _(d

9、ownload)onto it!,be borrowed,be thrown,been downloaded,7.Has the computer _(repair)yet?I need to write my article with it.8.What have _(turn on)?The radio.,been turned on,been repaired,Exercises,Complete the quiz questions and choose the correct answer.,Who/pyramids/build?Who were the pyramids built

10、 by?a)The Egyptians b)The Ancient Greeks c)The Romans,2.What/use/to make paper since the 19th century?What was used to make paper since the 19th century?a)Wood b)Silk c)Cotton,3.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 London,

11、4.where/the worlds oldest book printed on paper/discover?Where was the worlds oldest book printed on paper discovered?a)In India b)In Chinac)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 years,Exercises,Make questions an

12、d write answers.,What/shouldnt/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

13、the place changed?,Use these words:add,change,open,paint,put,turn on,take away,The windowThe capThe lightThe basketballThe sweaterThe paintingTwo chairsThe booksThe dishes,have/has been,Exercises,Complete the passage with the correct form of the words.,From about 500 BC,pens _ for writing.The feathe

14、rs of large birds_ and dried.The point of each feather was sharpened.,call,clean,develop,introduce,invent,produce,spread,use,write,were used,were cleaned,Then 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

15、 writing point _ Only a few words could _,however,before the writer had to fill the pen with ink again.,were written,was invented,were produced,Many years later,the fountain pen _ from these early pens.In 1950,a European called Laszlo Biro invented the ballpoint pen.The popularity of writing _ quick

16、ly with the _ of the ballpoint pen.Even today,ballpoint pen,or Biros,as they _,are much less expensive,compared with the fountain pens.,spread,was developed,are called,introduction,Exercises,Complete the sentences with the phrases in the box.,1.Could you imagine a digital image of Yao Ming on the wa

17、ll _ a poster?,rather than,by 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 maga

18、zines online.,by hand,from now on,for ages,I wonder,Around the world,E-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 great improvement in technology.,Notes can be written on the e-book,new books can be easily downloaded from the In

19、ternet,and its muchEasier and quicker to search for passages.Whats More,a lot of paper will be saved.Nowadays,the most Advanced e-book is about 620g,18cm long,12cm wide and 2cm thick.,It looks like a real book.But the E-book is more expensive than paper books,so not many people can afford it.However,with the rapid progress of electronic technology,the e-book will become more convenient and cheaper.It is said that in the near future,there will be more e-books than paper books.,Module task,Discuss how to improve inventions,