Unit 3《The internet》Period Three课件 人教高中必修二.pptx(课件中不含音视频素材)

1、Unit 3The InternetPeriod ThreePART 1语法导学PART 2达标检测Period ThreeDiscovering Useful StructuresThe present perfect passive voicePART 1语法导学感悟规律 重点难点剖析感知以下句子，完成方框下的小题感知以下句子，完成方框下的小题语法感知1.Much has been written about the wonders of the World Wide Web.2.Peoples lives have been changed by online communities a

2、nd social networks.3.Many people have been helped by the club.4.Jans life has been greatly improved by the Internet.5.A kind of new PC has been built with more functions.1.以上句子中所使用的时态和语态以上句子中所使用的时态和语态是是 。2.现在完成时的被动语态的构成为现在完成时的被动语态的构成为：。现在完成时的被动语态现在完成时的被动语态have/has been过去分词过去分词现在完成时的被动语态表示到现在为止某事已经被完

3、成或被做。这种语现在完成时的被动语态表示到现在为止某事已经被完成或被做。这种语法项目既要表示现在已经完成又要表示被动的含义，因此很多同学在具体运法项目既要表示现在已经完成又要表示被动的含义，因此很多同学在具体运用中容易顾此失彼，难以把握。用中容易顾此失彼，难以把握。运用现在完成时的被动语态时应掌握以下几个问题运用现在完成时的被动语态时应掌握以下几个问题：一、现在完成时的被动语态的常用句式一、现在完成时的被动语态的常用句式语法精析肯定式肯定式主语主语have/has been done.否定式否定式主语主语have/has not been done.一般疑问式一般疑问式Have/Has主语主语

4、been done.？特殊疑问式特殊疑问式疑问词疑问词have/has主语主语been done.？He has been admitted to the club.他已被接纳为俱乐部成员了。他已被接纳为俱乐部成员了。Toms novel has not been published.汤姆的小说还没有被出版。汤姆的小说还没有被出版。Has his bike been repaired?他的自行车修好了吗？他的自行车修好了吗？Who has been invited?谁受到了邀请谁受到了邀请？二、现在完成时的被动语态的用法二、现在完成时的被动语态的用法1.表示被动的动作在说话之前已经完成，强调过

5、去的动作对现在造成的影响或表示被动的动作在说话之前已经完成，强调过去的动作对现在造成的影响或产生的结果，通常与产生的结果，通常与already，yet，never，recently等副词及时间状语等副词及时间状语so far，by now，up till/to now，since等连用。等连用。The room has already been cleaned.这个房间已经被打扫干净了。这个房间已经被打扫干净了。(现在已经不用打扫房间了现在已经不用打扫房间了)2.表示一个被动的动作或状态从过去开始一直持续到现在，并可能继续持续下表示一个被动的动作或状态从过去开始一直持续到现在，并可能继续持续下

6、去，常与去，常与for或或since等引出的时间状语等引出的时间状语(从句从句)连用，或用于连用，或用于how long引出的句子引出的句子中。中。The machine has been repaired for two hours.这台机器已经被修了两个小时了。这台机器已经被修了两个小时了。(可能还会继续被修可能还会继续被修)3.用在条件状语从句中，表示将来某时已经完成的动作。用在条件状语从句中，表示将来某时已经完成的动作。You shouldnt leave school before your homework has been finished.在你的作业没完成之前你不应该离开学校。

7、在你的作业没完成之前你不应该离开学校。三、使用现在完成时的被动语态要注意三、使用现在完成时的被动语态要注意6点问题点问题1.与一般过去时的被动语态的区别。一般过去时的被动语态所表示的动作或状与一般过去时的被动语态的区别。一般过去时的被动语态所表示的动作或状态与现在的情况没有联系，而现在完成时的被动语态则强调与现在的情况有联态与现在的情况没有联系，而现在完成时的被动语态则强调与现在的情况有联系。系。The park was opened to the public last year.去年这个公园向公众开放。去年这个公园向公众开放。(说明动作发生于过去说明动作发生于过去)The park has

8、 been opened to the public.这个公园已向公众开放。这个公园已向公众开放。(说明动作发生于过去，但对现在有影响，即现在公园说明动作发生于过去，但对现在有影响，即现在公园已经向公众开放了已经向公众开放了)2.非延续性动词，如非延续性动词，如borrow，finish，begin，start，buy，marry，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。表达相应的意思，则要改换动词或时态。The work was finished two

9、weeks ago.这项工作于两周前被完成。这项工作于两周前被完成。The work has been finished.这项工作已经被完成。这项工作已经被完成。3.短语动词是一个不可分割的整体，在被动语态中要保持完整性，其中的介短语动词是一个不可分割的整体，在被动语态中要保持完整性，其中的介词或副词不可省略。词或副词不可省略。It is said that the problem has been looked into.据说已经调查了这个问题据说已经调查了这个问题。4.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

10、动语态的主语。的主语。We have built many houses in the past ten years.Many houses have been built in the past ten years.5.带有双宾语的动词，如带有双宾语的动词，如give，send，bring，take，teach，show，tell，make，sing，write，read，sell，buy，tell，pay，lend，pass，promise等，等，变为被动语态时，可将其中一个宾语变为主语，另一个保留不动。变为被动语态时，可将其中一个宾语变为主语，另一个保留不动。We have given

11、him the book.He has been given the book.The book has been given to him.6.带有复合宾语的动词变为被动语态时，只能将宾语变为主语，原来的宾补带有复合宾语的动词变为被动语态时，只能将宾语变为主语，原来的宾补改为主语补足语。原来省略改为主语补足语。原来省略to的不定式作宾补的，被动语态中要用带的不定式作宾补的，被动语态中要用带to的不的不定式。定式。I have told them to help you.They have been told to help you.PART 2达标检测当堂检测 基础达标演练1.Jacks b

12、oss has always praised him for his devotion to work.Jack by his boss for his devotion to work.2.They have found a good place to build a temple in the village.A good place to build a temple in the village.3.We havent yet decided how to solve that difficult technological problem.How to solve that diff

13、icult technological problem yet.4.I have asked her to help you.She to help you.用现在完成时的被动语态改写句子用现在完成时的被动语态改写句子has always been praisedhas been foundhasnt been decidedhas been asked5.He has given the child some interesting books.The child some interesting books.Some interesting books the child.has been

14、 givenhave been given toLi 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 something there after the earthquake?Lin Tao：Of course.Since the earthquake 7.(happen)，many so

15、ldiers 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.Li Ming：How about the schools there?.语法填空语法填空(用所给词的正确时态、语态填空用所给词的正确时态、语态填空)have been workinghappenedhave been senthave been carriedlive/are livingLin

16、Tao：Several new schools 11.(set)up and also some schools which 12.(damage)in the earthquake 13._(rebuild).So all the students can go back to school to study now.Li Ming：Thats wonderful.Im sure their life will be better and better.When will your parents come back?Lin Tao：They will be back next month.have been setwere damagedhave been rebuilt