Unit 3 Discovering Useful Structures 现在完成时被动语态（ppt课件）-2023新人教版（2019）《高中英语》必修第二册.pptx

1、Unit 3 The InternetDiscovering Useful StructuresTalk about something that has been done现在完成时的被动语态现在完成时的被动语态Read the pairs of sentences.Underline and compare the different verb forms.Jans life has been greatly improved by the Internet.Much has been written about the wonders of the World Wide Web.The

2、Internet has greatly improved Jans life.People have written much about the wonders of the World Wide Web.The students have cleaned the classroom.The classroom has been cleaned.You neednt clean it now.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，主语是动作的承受者。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。现在完成时的被动语态现在完成时的被

3、动语态现在完成时现在完成时被动语态被动语态have/has been done现在完成时的被动语态现在完成时的被动语态be donehave/has beenHow do we form the present perfect passive voice?现在完成时的被动语态现在完成时的被动语态现在完成时的被动语态现在完成时的被动语态一、用法：1、现在完成时的被动语态强调一个发生在过去的被动性的动作，动作已完成并强调对现在造成的影响或结果。表示动作从过去延续到现在表示动作从过去延续到现在并有可能继续延续下去并有可能继续延续下去2、动词和被修饰主语构成被动关系。肯定形式：肯定形式：His hom

4、ework has been finished.否定形式：否定形式：His homework has not been finished.一般疑问句一般疑问句:Has his homework been finished yet?特殊疑问句：特殊疑问句：How long has his homework been finished?主语主语+have/has been done.主语主语+have/has not been done.have/has+主语主语+been done.?疑问词疑问词+have/has+主语主语+been done.?现在完成时的被动语态现在完成时的被动语态现在完成

5、时的被动语态现在完成时的被动语态三、解题步骤 1.根据句意确定时态 2.确定主被动 3.定谓have/has现在完成时与现在完成时被动语态的动词形式找出下面句子的谓语结构，哪些是主动？哪些是被动？1.Jans life has been greatly improved by the Internet.2.The Internet has greatly improved Jans life.3.People have written much about the wonders of the World Wide Web.4.Much has been written about the w

6、onders of the World Wide Web.被动主动主动被动 现在完成时谓语结构 主动被动have/has donehave/has been done.已经被.语 法 导 学感知句子，完成方框下的小题感知句子，完成方框下的小题一名敌人被击杀。An enemy has been slained.我方队友被击杀。An ally has been slained.你被击杀了。You have been slained.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

7、语态have/has been过去分词过去分词【考点精讲】现在完成时1.常与以下时间状语连用：recently,yet,already,just,before,lately,since+时间状语（从句）”,“for+时间段”,(ever)since,these days,before,so far,in the last/past few years,up to now,till now，by+现在时间等。*I have just/alreay turned off the light.*They have been good friends since they met at a meeti

8、ng.*She has worked in the school for ten years.常与现在完成时连用的时间状语有：常与现在完成时连用的时间状语有：already 已经 yet 已经recently/lately 最近 since then 从那时起ever since 自那以来 ever 曾经so far 迄今为止 by now 到现在为止for a long time 很长一段时间in recent years 在最近几年里in/during/over the past/last years 在过去的几年里现在完成时的被动语态现在完成时的被动语态recently,yet,alre

9、ady,just,before,lately,since+时间状语（从句）”,“for+时间段”,(ever)since,these days,before,so far,in the last/past few years,up to now,till now，by+现在时间等。2.在条件、时间、让步状语从句中,表示将来某时已完成的动作。*I shall post the letter as soon as I have written it.3.下列句型中常用现在完成时:It is(has been)+一段时间+since从句(从句用一般过去时)This/It is the first(s

10、econd.)time+that从句(从句用现在完成时)1.现在完成时的被动语态、现在进行时的被动语态及一般过去时的被动语态的区别现在完成时的被动语态、现在进行时的被动语态及一般过去时的被动语态的区别The machine has been repaired.（说明动作发生在过去，对现在有影响，“现在修好了”）The machine is being repaired now.（说明动作正在进行）The machine was repaired yesterday.（只说明动作发生在过去）2.非延续性动词，如非延续性动词，如borrow,finish,begin,start,buy,marry

11、,open,join等构成的现在完成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。时态。例：工程已开始三个月了。The project has been started for three months.（F）The project has been on for three months.（T）现在完成时的被动语态现在完成时的被动语态Practice I Tall buildings_(build)everywhere.have been builtShopping

12、 centers _ (rebuild).have been rebuiltSome factories _ (set up)to improve economies.have been set upeconomy knm n.经济；节约；理财The road _(widen).has been widenedMore dustbins _ (place)on the streets.dust 灰尘灰尘bin 箱子，容器；箱子，容器；dstbnhave been placedMore and more trees and flowers _(plant)on the either side o

13、f the roads.have been planted1.现在完成时的被动语态强调一个发生在过去的被动性的动作，动作已完成并现在完成时的被动语态强调一个发生在过去的被动性的动作，动作已完成并强调对现在造成的影响或结果，主语和谓语之间为被动关系。强调对现在造成的影响或结果，主语和谓语之间为被动关系。例：The door has already been locked.门早已经被锁上了。I have been employed at the job since 2015.自从2015年，我就做这份工作。现在完成时的被动语态现在完成时的被动语态2基本构成基本构成：has/have been do

14、ne。其他句式：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.?特殊疑问式特殊疑问词have/has主语been done.?现在完成时的被动语态现在完成时的被动语态1.用现在完成时的被动语态改写、翻译句子用现在完成时的被动语态改写、翻译句子Jacks boss has always praised him for his devotion to work.Jack _ by his boss for his devotion to work.They have found a good

15、 place to build a temple in the village.A good place to build a temple in the village _.We havent yet decided how to solve that difficult technological problem.How to solve that difficult technological problem _ yet.当我的家庭作业完成时我就回家。I will go home when my homework _.纸币已被使用了1000多年了。Paper money _ for ov

16、er one thousand yearshas always been praisedhasnt been decidedhas been found巩固强化巩固强化has been finishedhas been used2.将下面句子变为被动语态将下面句子变为被动语态I have asked her to help you_We have planted many trees on the hill in the last 5 years_He has sent me an email_She has been asked by me to help you.Many trees have been planted on the hill by us in the last 5 years.I have been sent an e-mail by him.An e-mail has been sent to me by him.巩固强化巩固强化Thank you!