Unit 3 The Internet Discovering Useful Structures（ppt课件）-2023新人教版（2019）《高中英语》必修第二册.pptx

1、现在完成时现在完成时have/has+v-ed表示说话时表示说话时已经完成的动作已经完成的动作，而且这个动作的，而且这个动作的结果结果对现在仍有影响对现在仍有影响;表示动作表示动作发生在过去发生在过去，但，但一直持续到现在一直持续到现在，并且，并且有可能继续持续有可能继续持续下去。下去。Do you know the structures and meanings Do you know the structures and meanings of the of the present perfect tense present perfect tense and and passive pa

2、ssive voicevoice?Unfinished events that started in the past continue to the present.e.g.I have lived in Changsha for five years.(I still live in Changsha now.)e.g.I have lived in Changsha since 2015.ReviewThe students have cleaned the classroom.The classroom has been cleaned.You neednt clean it now.

3、现在完成时现在完成时activepassive表示说话时已经完成的被动性的动作或结果，表示说话时已经完成的被动性的动作或结果，主语是动作的承受者。主语是动作的承受者。现在完成时的被动语态现在完成时的被动语态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”例：They are building nine parks.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“三不变三不变”原句原句意思意思不变不变 原句原句时态时态不变不变 原句原句主谓宾以外主谓宾以外成分不变成分不变Nine parks _ by them.are being built时间

4、状语时间状语just;already;ever;never;yet;so far;by now 不明确的时间不明确的时间一段时间一段时间for 3 days;since 3 days ago包括说话时间的包括说话时间的时间时间this morning,this week,this month,this year 现在完成时的被动语态【语法感知】观察下列课文原句1.Much has been written about the wonders of the World Wide Web.2.People s lives have been changed by online communitie

5、s and social networks.3.Many people have been helped by the club.4.Jan s life has been greatly improved by the Internet.现在完成时与现在完成时被动语态的动词形式现在完成时与现在完成时被动语态的动词形式找出找出下面句子的下面句子的谓语谓语结构，哪些是结构，哪些是主动主动？哪些是？哪些是被动被动？1.Jans life has been greatly improved by the Internet.2.The Internet has greatly improved Jan

6、s life.3.People have written much about the wonders of the World Wide Web.4.Much has been written about the wonders of the World Wide Web.被动被动主动主动主动主动被动被动 现在完成时现在完成时谓语谓语结构结构 主动主动被动被动have/has donehave/has donehave/has have/has beenbeen donedone.已经被已经被.例例2：Have they been sent abroad to study Eng-lish?

7、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？陈述句陈述句 主语主语+has/have been（not）+P.P.+.例例1 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+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+been+P.P.+.?一、现在完成时被动语态的构成一、现在完成时被动语态的构成二、现在完成时的的结构：二、现在完成时的的结构：肯定式：肯定式：S+ha

8、ve/has+V-过去分词(done)否定式：S+have/has+not+V-过去分词.一般疑问句：Have/Has+S+V-过去分词.特殊疑问句：疑问词+have/has+S+V-过去分词.人教版人教版20192019版版 高一高一 unit3 The Internet grammarunit3 The Internet grammar【优秀课件优秀课件】三、现在完成时被动语态的用法1.现在完成时的被动语态,强调过去的动作对现在造成的影响或结果,通常与already,yet,just,never,recently等副词连用。*The song Baby Shark has already

9、been played 7.04 billion times on YouTube.宝贝鲨鱼这首歌曲已经在YouTube上被播放了70.4亿次。2.表示一个被动的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。*Although paid leave has been included in the country s labor law for more than 20 years,few workers could enjoy it.尽管带薪休假被纳入国家劳动法已有20多年,但是落实率并不高。e.g:在你的作

10、业没完成在你的作业没完成(finish)(finish)之前你不应该离开学校。之前你不应该离开学校。You shouldnt leave school before your homework has been finished.人教版人教版20192019版版 高一高一 unit3 The Internet grammarunit3 The Internet grammar【优秀课件优秀课件】3.3.用在时间或条件状语从句中，表示用在时间或条件状语从句中，表示将来某时已完成的动将来某时已完成的动作作，也就是也就是用用现在完成时的被动语态现在完成时的被动语态替代替代将来完成时的被动将来完成时的

11、被动语态语态。注意：下来情况下用被动语态：注意：下来情况下用被动语态：1.1.强调动作的承受者强调动作的承受者，即动作的承受者即动作的承受者是是谈话的中心谈话的中心。2.2.不知道或不必要或不知道或不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的定语。当动作的执行者带有较长的定语。练习练习We have already invited the singer.The singer has already been invited.The singer has not been invited yet.Has the singer b

12、een invited?Who has been invited?被动被动否定否定一般疑问一般疑问对宾语提问对宾语提问 现在完成时的被动语态与一般过去时的被动语态的区别。一般过去时的被动语态表示的是一个被动的动作发生在过去某个时候,它的结果对现在没有影响;而现在完成时的被动语态,动作或状态尽管发生在过去,但强调这个动作或状态对现在造成的影响和结果。*The house was builtwas built last year.这个房子是去年建造的。*The house has been built.has been built.We can move in.这个房子已经建好了。我们可以搬进去。

13、四、现在完成时被动语态的拓展延申五、几点注意事项1.只带有一个宾语的动词变为被动语态时,将主动语态的宾语变为被动语态的主语。*As for the epidemic,our government has taken a great many measures to contain it.As for the epidemic,a great many measures have been taken by our government to contain it.对于这场疫情,政府已经采取了很多措施来控制。2.非延续性动词如borrow,finish,begin,start,buy,marry

14、,open,join等构成的现在完成时的被动语态不能与表示一段时间的状语连用。若要表达相应的意思,则要改换动词或时态。*The work was finishedwas finished two weeks ago.这项工作在两周前已经完成。3.带有双宾语的动词,如give,send,bring,take,teach,show,tell,buy,lend,promise等,变为被动语态时,一般将间接宾语变为被动语态的主语,若将直接宾语变为被动语态的主语时,间接宾语前面要用相应的介词。*Their teacher has given them many chances to practice w

15、hat they have learned in class.Many chances have been given to them to practice what they have learned in class(by their teacher).They have been given many chances to practice what they have learned in class(by their teacher).他们的老师给了他们很多机会练习上课所学(的内容)。Exercises1.First as a PC and then as a laptop,I _

16、(use)in offices and homes since the 1970s.2.Over time my memory _(develop)so much that I never forget anything I _(told).3.Since the 1970s many new applications _(find)for me.4.I have also _(put)into robots and used to make mobile phones as well as _(help)with medical operations.has developedhave be

17、en told have been used have been foundbeen puthelped.单句语法填空1.We are glad to be told that Li Tao _(admit)to Fudan University.2.All the preparations for the task _(complete),and we re ready to start.3.When and where to go for the on-salary holiday _(decide)yet.4.This book _(translate)into many languag

18、es.5.The dictionary is out of date:many words _(add)to the language since it was published.has been admittedhave been completedhas not been decided has been translatedhave been added6.By now 516 Confucius Institutes _(found)in 142 countries and regions.7.As _(plan),we will gather and set off/out at

19、the school gate at 8:00,December 10.8.Recently,for various reasons,our living environment _(pollute)worse and worse.9.There are many good qualities that _(pass)on from generation to generation in my family.10.Measures _(take)to cope with these problems by the government up to now.have been foundedha

20、ve been foundedhas been plannedhas been pollutedhave been passedhave been taken.语法语法填空填空(用用所给词的正确时态、语态所给词的正确时态、语态填空填空)Li Ming：Hi，Lin Tao.How nice to see you on the first day of the new term!Lin Tao：Yes.Nice to see you again.Li Ming：I know that your parents 6.(work)in Yushu for years.Can you tell me

21、something there after the earthquake?Lin Tao：Of course.Since the earthquake 7.(happen)，many soldiers 8.(send)there，and many kinds of supplies(物资供应物资供应)9.(carry)there from all over the country.Now，most people there 10.(live)a happy life again.have been workinghappenedhave been senthave been carriedli

22、ve/are livingTask3 语篇总结归纳:主题深化Jan Tchamani,an English teacher in Birmingham,UK,suddenly developed a serious illness.She found herself out of work and 1._(stick)at home.After a while,she discovered that 2._(surf)the Internet could help her feel less lonely and bored.She could do everything online.She

23、 also joined 3._ online group where she could talk about her problems and get support and advice 4.to_ others.She realised that one of the greatest 5._(benefit)of the Internet was its ability to remove the distance 6._ usually exists between people.7._(inspire)by the people online,she started an IT

24、club and taught somestuck surfinganbenefits that/whichInspiredolder people how to use Internet.She and her friends organise events and collect money 8._(pay)for private teachers.Jan has started taking online classes to learn more about how to use the Internet to make society 9._(good).Jan s life has been 10._(great)improved by the Internet!to paybettergreatly1.Review grammar.2.Read the text on page 28 again and underline all sentences of the present perfect and present perfect passive voice.