Unit3 Discovering useful structures（ppt课件）-2022新人教版（2019）《高中英语》必修第二册.pptx

1、Unit 3 The InternetTo learn the present perfect passive voiceTo use the present perfect passive voice to do some exercises and talk about something has been doneTo read a poem and learn to write your own poemStep1 Lead inActive and passive voices单击输入您的封面副标题Lead-inStep2 Presentation现在完成时have/has+v-ed

2、表示说话时已经完成的动作，而且这个动作的结果对现在仍有影响;表示动作发生在过去，但一直持续到现在，并且有可能继续持续下去。Do you know the structures and meanings of the present perfect tense and passive voice?被动语态助动词be+vt.-edbe随主语的人称、数和时态的变化而变化。当强调动作承受者，不必说出执行者或含糊不清的执行者时，多用被动语态。Read the pairs of sentences.Underline and compare the different verb forms.Jans li

3、fe has been greatly improved by the Internet.The Internet has greatly improved Jans life.Much has been written about the wonders of the World Wide Web.People have written much about the wonders of the World Wide Web.Read the passage again and complete the sentences.Peoples lives _(change)by online c

4、ommunities and social networks.Many people _(help)by the club.Jans life _(improve)greatly by the Internet.have been changedhave been helpedhas been improvedVerb formActivePassivehave/has+been+v-edHow do we form the present perfect passive voice?Fill in the blank.have/has+v-ed_表示表示“某人某人/某事某事/某物已经被某物已

5、经被”Change the sentences into the present perfect passive voice.Theyve built a kind of new PC with more functions.A kind of new PC has been built with more functions.n.功能；作用vi.起作用；运转主动语态变被动语态的原则主动语态变被动语态的原则“三变三变”原句原句主语主语 by的的宾语宾语宾语宾语 主语主语 谓语谓语由主动由主动 被动被动n.电池vt.确认；使确信 1.I have downloaded the software

6、to help my phone battery last longer.2.Someone has lost an identity card.3.Have you confirmed the Wi-Fi password?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?4.Have you pressed the button yet to copy the fi

7、le?5.Has anyone made a comment about the online database?Has the button been pressed yet to copy the file?Has a/any comment been made about the online database?n.文件,档案现在完成时的被动语态意义及结构现在完成时的被动语态意义及结构表示动作发生在过去表示动作发生在过去,到现在已经完成或对现在产生的影响。到现在已经完成或对现在产生的影响。动词和被修饰主语构成被动关系（例句结合导学案动词和被修饰主语构成被动关系（例句结合导学案P55）肯定

8、式：肯定式：have/has+been+v-ed.否定式：否定式：have/has+not+been+v-ed.一般疑问句：一般疑问句：Have/Has+主语主语+been+v-ed.?特殊疑问句：特殊疑问句：疑问词疑问词+have/has 主语主语+been+v-ed.?注意：下面情况下用被动注意：下面情况下用被动语态：语态：1.1.强调动作的承受强调动作的承受者者，即动作的承受者即动作的承受者是是谈谈话的中心话的中心。2.2.不知道或不不知道或不必要或必要或为了委婉为了委婉/礼貌礼貌,不不便便说出动作的发出者。说出动作的发出者。3 3.当动作的执行者带有较长当动作的执行者带有较长的定语。的

9、定语。现在完成时的被动语态有两种情况：现在完成时的被动语态有两种情况：1)表表过去开始的被动动作一直持续到现在过去开始的被动动作一直持续到现在，常连用的时间状，常连用的时间状语有：语有：for+段时间，段时间，since+时间状语时间状语(从句从句)，these days,so far,up to now,in the last/past few years等。等。eg This class have been taught by Mr.Brown for two years.His Chinese has been improved a lot since he came to China.

10、Rowlings novels have been translated into many foreign languages so far.2)表某表某被动动作对现在造成的影响或结果被动动作对现在造成的影响或结果，常与，常与already,yet,just,ever,never,recently等连用。等连用。eg The bike has not been repaired yet.I have already been introduced to Mr.Smith.注意：注意：有些动词没有被动语态有些动词没有被动语态,如不及物动词如不及物动词happen,take place,brea

11、k out等。等。1.1.副词的位置副词的位置(1)Such a man has hardly been believed.(2)The machine has already been repaired.注意：注意：2.2.并不是所有动词都有被动语态并不是所有动词都有被动语态不及物动词不及物动词和和系动词系动词都都没有被动语态没有被动语态形式。但它形式。但它们中的们中的某些不及物动词某些不及物动词虽为虽为主动形式主动形式，却，却可表示可表示被动意义被动意义。(1)The steel feels cold.(2)The book smells old.(3)Good medicine tast

12、es bitter.often,usually,always,never,hardly,seldom等副词等副词置于置于have/has和和been中间。中间。(结合导学案结合导学案P55)P55)The patients have been taken good care of.3.3.短语动词不可分割也不可省略其中的介词或副短语动词不可分割也不可省略其中的介词或副 词。词。Step3 Practicethe buildings,destroy,earthquake The buildings have been destroyed by the earthquake.Look at the

13、 pictures,first list some key words,then make up sentences using the present perfect passive voice.machinereplacecomputerThe machine has been replaced by the computer.in our city,a new bridge,buildA new bridge has been built in our city.recently,many trees,plant,along the roadMany trees have been pl

14、anted along the road recently.seven Harry Porter books,J.K.Rowling,so far,writeSeven Harry Porter books have been written by J.K.Rowling so far.单句写作1.My identity card has been lost by me(我的身份证被我弄丢了)for more than a week,which causes inconvenience to me.(lose)2.My doubts about the companys future have

15、 been removed(已经被消除了 )by the news.(remove)3.The economy has been promoted(经济得以提升 )since the policies were put into effect.(promote)4.Over the past decades,air quality has been affected by human activites(空气质量受到人类活动的影响 ).(affect)5.Since the former manager retired,the company has been taken over by a

16、brilliant man(公司被一个杰出的人接管了).(take over)Underline the use of the present perfect passive voice in the following poem.Then fill in the chart below.Look at the way your face has been washedLook at the way your teeth have been brushedLook at the way your shoes have been cleanedYoud better do them again.

17、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 again.Things that have been done wellThings that have been done badlythe way the flowers have been plantedthe way the grass has been cutthe way the

18、paths have been sweptthe way your face has been washedthe way your teeth have been brushedthe way your shoes have been cleanedRead the poem again.Think of your own situation and write a similar one.Look at the way your face has been washedLook at the way your teeth have been brushedLook at the way y

19、our shoes have been cleaned Youd 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 again.Look at the way the floor has been cleaned Look at the way the blackboard has been wiped

20、Look at the way the way the desks and chairs have been arranged Youd better do them again.SampleLook at the way the topic has been chosen Look at the way the words have been used Look at the way the passage has been developed I hope you write it again.Look at the way _Listen to the way _Look at the

21、way _the picture has been paintedthe song has been writtenthe film has been madeNow think about what you could create.Look at the way _Look at the way _Look at the way _the needy have been helpedthe river has been cleanedthe trees have been plantedNow think how to make the world a better place.Step4

22、 SummarySUMMMARY现在现在完成完成时的时的被动被动语态语态含义含义结构结构表示过去发生的被动动作现在已经完表示过去发生的被动动作现在已经完 成或仍将持续成或仍将持续,强调对现在的影响强调对现在的影响have/has been done形式形式肯定式肯定式否定式否定式疑问式疑问式have/has been donehave/has not been doneHave/Has+主语+been done?特殊疑问词+have/has+主语+been done?用法用法表示已经完成的被动动作表示已经完成的被动动作表示表示过去开始的被动动作一直持续到现在过去开始的被动动作一直持续到现在表表示示某某被动动作对现在造成的影响或结果被动动作对现在造成的影响或结果注意注意事项事项动词短语不可分割也不可省略其中的介词和副词动词短语不可分割也不可省略其中的介词和副词不及物动词或词组无被动不及物动词或词组无被动HomeworkFinish the exercise on your reference book.Thank you