Unit 3 Discovering Useful Structures 公开课（ppt课件）-2022新人教版（2019）《高中英语》必修第二册.pptx

1、Discovering Useful Structuresn By the end of this period,you will be able to1.analyze the forms and features of the present perfect passive voice.2.find out the differences in meaning and function between the active and passive forms.3.master the functions of the present perfect passive voice in the

2、 context and use it in real situations.What aspects in your life have been changed since the appearance of the Internet?Lead in BeforeAfterTransport Reading Payment Entertainment Try to tell the changes according to the table using the present perfect passive voice.foot;bike;bus;train plane;high-spe

3、ed railpaper books E-books in cash;by credit E-payment watch movies in the theaterStream movies and music;chat online1.Jans life has been greatly improved by the Internet.The Internet has greatly improved Jans life.2.Much has been written about the wonders of the World Wide Web.People have written m

4、uch about the wonders of the World Wide Web.Observe and analyze Underline and compare the different verb forms.Active _Passive _The form of the present perfect passive voiceVerb formhave/has+v-ed have/has been+v-ed1.定义定义 表示动作已经完成，强调对现在造成的影响和结表示动作已经完成，强调对现在造成的影响和结果。果。常与一些副词连用，如常与一些副词连用，如already,ever,

5、never,recently，lastly,just,yet等，通常把副词放在助动词等，通常把副词放在助动词have或或 has的后的后面，有时候也可以放在句末。面，有时候也可以放在句末。表示一直持续到现在的动表示一直持续到现在的动作或作或状态状态。经常与经常与fora time,since,how long,so far等表示一段时间的时间状语连用等表示一段时间的时间状语连用。The child has bee taken care of by gandma all these years.这些年来，孩子一直由奶奶照看这些年来，孩子一直由奶奶照看。Summary：the present pe

6、rfect passive voice例例2：Have they been sent abroad to study Eng-lish?他们已经被派往国外学英语了吗他们已经被派往国外学英语了吗?例例3：Who has been invented?谁受到了邀请？谁受到了邀请？2.构成构成陈述句陈述句 主语主语+has/have been（not）+P.P.+.例例1：Her motorbike has been stolen.她的摩托车盗了。她的摩托车盗了。一般疑问句一般疑问句 Has/have+主语主语+been+P.P.+.?特殊疑问句特殊疑问句 特殊疑问词特殊疑问词+have/has+be

7、en+P.P.+.?3.3.注意事项注意事项由由finish,buy,start,begin,post,return,borrow,marry,open等词构成的现在完成时的被动语态等词构成的现在完成时的被动语态,不能与不能与表示段时间的状语，如表示段时间的状语，如for four days,how long等连用，等连用，而要改换动词或者是时态。而要改换动词或者是时态。判断正误判断正误:*How long has this book been bought?()*How long ago was this book bought?()短语动词不能分割，而且不能省略短语动词中的介短语动词不能分

8、割，而且不能省略短语动词中的介词或副词。词或副词。判断正误判断正误:*The patient has been taken good care.()*The patient has been taken good care of.()XVXV 并不是所有的动词都有被动语态。如并不是所有的动词都有被动语态。如happen,occur,take place,break out,belong to,cost,last 等不及物动词等不及物动词或词组，就没有被动语态。或词组，就没有被动语态。判断正误判断正误:*Some of the best conversations have ever happe

9、ned around the dinner table.()*Some of the best conversations happened around the dinner table.()双宾语动词变被动语态可将其中的一个宾语变为主双宾语动词变被动语态可将其中的一个宾语变为主语语,另一个保留不动。另一个保留不动。主动主动:I have given him the key.被动被动:He has been given the key.被动被动:The key has been given(to)him.VX带复合宾语的动词变被动语态时带复合宾语的动词变被动语态时,只能将宾语变为只能将宾语变

10、为主语主语,原来的宾补保留不动原来的宾补保留不动,改成主语补足语。改成主语补足语。主动主动:I have asked her to help you.被动被动:She has been asked to help you.主动语态中作宾语补足语的不带主动语态中作宾语补足语的不带to的不定式，变为被动时，要加上的不定式，变为被动时，要加上to。例：例：The engineer made the robot clean the windows of the tall building.The robot was made to clean the windows of the tall build

11、ing.PracticeChange the sentences into the present perfect passive voice.ExampleThey have built a kind of new PC with more functions.A kind of new PC has been built with more functions.1.I have downloaded the software to help my phone battery last longer.2.Someone has lost an identity card.3.Have you

12、 confirmed the Wi-Fi password?4.Have you pressed the button yet to copy the file?5.Has anyone made a comment about the online database?1.I have downloaded the software to help my phone battery last longer.2.Someone has lost an identity card.3.Have you confirmed the Wi-Fi password?4.Have you pressed

13、the button yet to copy the file?5.Has anyone made a comment about the online database?The software has been downloaded to help my phone battery last longer.An identity card has been lost.Has the Wi-Fi password been confirmed?Has the button been pressed yet to copy the file?Has a/any comment been mad

14、e about the online database?What are the differences in meaning and function between the active and passive forms?The object in an active sentence becomes the subject in a passive sentence.Both sentence types convey a similar meaning,but they are slightly different.Active sentences are used often,as

15、 they are more direct.Passive sentences are often used when the doer of an action is unknown,not important,or preferred not named.We use it when something has been done by someone at sometime up to now.We are not interested in the actor(行动者).Subject and its verb should be in a agreement.the present

16、perfect passive voiceComplete the notice with the correct forms of the verbs in brackets.(Workbook P75 Activity 4)Notice to parentsDear Parents,We hope you will welcome this news.Almost 100 computers _(give)to us by a local computer company since the end of last year.A decision _(make)to begin a com

17、puter teaching experiment at our school.Our plan _(support)with technical equipment and advice which _(provide)by the City Information Technology Center.Every teacher _(provide)with a laptop since the beginning of this term.More importantly,most of our courses _(teach)using computers.We _(help)in ou

18、r teaching by a lot of information from the Internet.Also,a new computer room _(set up)in our school.We hope you will be happy with this exciting new development in our school.No.8 Senior High Schoolhas been madehas been givenhas been supportedhas been providedhas been providedhave been taughthave b

19、een helpedhas been set up Find and correct the mistake in each sentence.EXAPLEThis app was used several times since I downloaded it.has been1.How much money has spent on the earthquake recovery?2.The girl is really upset because her new bicycle has stolen.3.These old houses have been built in the 18

20、th century.beenbeenwere4.Its a pity that the letter has never sent to his father.5.Little had been seen of them since they moved into the house down the street.beenhasEnjoy the poemLook at the way your face has been washedLook at the way your teeth have been brushedLook at the way your shoes have be

21、en cleanedYoud better do them again Look at the way the flowers have been plantedLook at the way the grass has been cutLook at the way the paths have been sweptI hope that youll come here again1.What are the subjects of your poems?2.Can you list some verbs connected to the subjects?3.Can you make a

22、sentence according to the example?Films,pictures,flowers,trees Make,paint,plantLook at the way the pictures have been painted.Look at the way the films have been made.BrainstormWritingThink of your own situation and write a similar poem.Look at the way your face has been washedLook at the way your t

23、eeth have been brushedLook 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 has been cutLook at the way the paths have been sweptI hope that youll come here againYour poem？Have you used the present perfect passive

24、 voice in your writing?Is your writing clear and logical?Are all the word spelt correctly?Is your handwriting easy to read?Self-assessmentLook at the way the picture has been paintedLook at the way the film has been madeLook at the way the poem has been writtenNow think about what you could create Look at the way the needy have been helpedLook at the way the river has been cleanedLook at the way the tree has been plantedNow think how to make the world a better placeFinish the Activities 2、3、5 in Using Structure of Workbook on page 74-75.