英语学科人教版Book 2 Unit 3 ComputersGrammar教学课件共20张PPT含学案及歌曲.ppt

1、英语学科人教版Book 2 Unit 3 ComputersGrammarThe Present Perfect Passive Voice现在完成时的被动语态Unit 3 ComputersTeaching Aims Teaching aims:1.现在完成时被动语态的结构2.现在完成时被动语态的主要用法3.使用现在完成时的被动语态需要注意的问题 Lead inRevision一般将来时被动语态(Future Passive Voice)构成形式:Will/shall+be+V过去分词shall 用于第一人称:I/we,will 用于任何人称否定句:在will/shall后+not一般疑问句

2、:把will/shall 提前be going to be+V过去分词be to be+V过去分词1.The playground will be cleaned by the students of class one.2.A meeting is going to be held(by us)on Saturday afternoon.3.The machine is to be repaired(by the twins)tomorrow.1.First as a PC(personal computer)and then as a laptop,I have been used in

3、officesAnd homes since the 1970s.2.Over time my memory has developed so much that,like an elephant,I never forget anything I have been told.3.Since the 1970s many new applications have been found for me.4.I have also been put into robots and used to make mobile phones as well as help with medical op

4、erations.5.I have even been put into space rockets and sent to explore the Moon and Mars.现在完成时的被动语态构成形式肯定式：主语+have/has been+done否定式:主语+have/has+not+been+done一般疑问式：have/has+主语+been+done特殊疑问式:疑问词havehas主语beendone1.The new bridge over the Yellow River has just been completed.2.Many more buildings have

5、been built in the past ten years.3.Who has been helped by the new computer？Look at the way your face has been washedLook at the way your hair has been combedLook at the way your shoes have been cleanedYoud better do them again.Look at the way the flowers have been plantedLook at the way the grass ha

6、s been cutLook at the way the paths have been sweptI hope that youll come here again.Underline the use of the present perfect voice in the following poem.Change the Active Voice into the Passive Voice:Group A1.We have finished our homework.2.Many visitors have visited the Great Wall.3.Mike has seen

7、two films since last month.4.The Russian government has turnedthese palaces into museums.Group B1.Our homework has been finished by us.2.The Great Wall has been visited by many visitors.3.Two films have been seen by Mike since last month.4.These palaces have been turned intomuseums.二、现在完成时被动语态的主要用法1

8、表示被动的动作发生在说话之前（即现在的过去),强调对现在造成的影响和结果。e.g：The door has been locked2.表示一个被动动作或状态开始于过去，持续到现在,并可能持续下去,常与for或since引导的时间状语连用,或用于How long？句型中How long has her work been finished？1现在完成时的被动语态有两个助动词，即have has和been，两者缺一不可。2.被动语态介词固定搭配不能省略。He has thought of a way of solving the problem.=A way of solving the prob

9、lem has been thought of.3.非延续性动词（如borrow,finish,begin,buy,start,return,marry,open,join等）的现在完成时的被动语态的肯定形式不能与表示一段时间的状语连用。This bike has been bought by my brother for almost four years.How long has this book been bought?How long ago was this book bought?Eg.The accident which happened yesterday surprised

10、 me.4.break out/happen/take place/arrive/become/die/disappear etc 不及物动词无被动语态误 Great changes have been taken place in China since 1978.正 Great changes have taken place in China since 1978.5.带双宾语的动词give/send/bring/take/teach/show/tell/make/sing/write/sell/buy/ask/pay/borrow/lend/hand/offer/provide/pas

11、t/get/promise 变被动语态有两种方法：（2）=The book has been given to him.（1）=He has been given the book.Eg.I have given him the book.(2)=We have been offered the most comfortable service by him.He has offered us the most comfortable service.(1)=The most comfortable service has been offered to us by him.Keys:1.Th

12、e construction of the new railway lines has not been finished by them by now.2.A new library and a gymnasium have been built by us in our school this year.3.A great many fine cars have been produced by the car factory since the technological revolution.4.A plan has been made by them to help the poor

13、 children in the poor area.5.A lot of money has been spent on the Hope Project by the government.二.1.has 后加been 2.has改 have 3.Builded 改 built4.was used 改has been used5.had written改have been 三.1.has been set up 2.have been told 3.have been done 4.have:been employed5.has not been decided 6.has been 7.

14、have been translated 8.has been translated 9.have not been painted 10.have taken place11.has been caused 12.have;been hatched四.1.has been visited 2.are not well protected 3.have already been damaged4.has been started 5.has been built 6.is said 7.have also been asked 8.were 9.have been returned 10.ar

15、e needed 11.was built 12.has been badly damaged二改错1.has 后加been2.has改 have 3.Builded 改 built4.was used 改has been used5.had written改have been1 Finish exercises 1,2,3,4 on page 2.Writing:Saying Thanks to Some useful expressions:I have been helped byI have been taughtI have been taken care ofPlease write a short composition about saying thanks to somebody by using the Present Perfect Passive Voice as much as possible.Homework: