Unit 3 Discovering Useful Structures （ppt课件） (2)-2023新人教版（2019）《高中英语》必修第二册.pptx

1、Unit 3 The InternetDiscovering Useful Structures 被动语态复习被动语态复习一、什么是语态？一、什么是语态？语态是英语动词的一种表现形式，用来说明语态是英语动词的一种表现形式，用来说明_和和_之间的关系。之间的关系。二、语态的种类：二、语态的种类：_和和_主语主语谓语动词谓语动词主动主动被动被动挑事儿：挑事儿：If you think youre such a tough guy,then hit me.(I dare)You hit me!Come and help me!I was hit/beaten.复习被动语态的构成：复习被动语态的构成：

2、(五种时态的被动语态）五种时态的被动语态）时态时态主动态主动态被动态被动态一般现在时一般现在时 一般过去时一般过去时 一般将来时一般将来时 现在完成时现在完成时 现在进行时现在进行时 am/is/are donedo/doesdidwas/were donewill dowill be donehave/has donehave/has been doneam/is/are doingam/is/are being done 现在完成时的被动语态现在完成时的被动语态Structure:S+has/have+past participleExample:She has completed the

3、 running.ReviewThe 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 f

4、orm 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How do we form the present perfect passive voice?Fill in the blank.Verb formActive have/has+v-edPassivehave/has been+v-edRead and compareTalk 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 comp

5、are 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 Internet has greatly improved Jans life.People have written much about the wonders of the World Wide Web.1Read the pairs of sentences.Underline and compa

6、re the different verb forms.Janes life has been greatly improved by the Internet.The Internet has improved Janes life.Read and compareThe first one is passive form,while the second one is active.has been v-edhas v-ed肯定形式：肯定形式：His homework has been finished.否定形式：否定形式：His homework has not been finishe

7、d.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：have/has done+v-ed表过去开始的被动动作一直持续到现在，常连用的

8、时间状语有：表过去开始的被动动作一直持续到现在，常连用的时间状语有：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。2)表某被动动作对现在造成的影响或结果，常与表某被动动作对现在造成的影响或结果，常与already,yet,just,ever,never,recently等连用等连用。注意：有些动词没有被动语态注意：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,break out等。等。An enemy has been sl

9、ain.Students in class 104 have been taught by Olivia since March.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

10、，如borrow,finish,begin,start,buy,marry,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Key points:请认准以下常与现在完成时连用的时间状语

11、请认准以下常与现在完成时连用的时间状语1.已经已经（常用在肯定句）（常用在肯定句）_2.已经已经 （疑问、否定句）（疑问、否定句）_3.最近最近 _4.从那时起从那时起 _5.自那以来自那以来_6.曾经曾经 _7.迄今为止迄今为止_8.到现在为止到现在为止_9.很长一段时间很长一段时间_10.在最近几年里在最近几年里_11.在过去的几年里在过去的几年里_12.在过去的三十年里在过去的三十年里_alreadyrecently/latelysince thenyetever sinceever 常用常用“have ever”so far；up to nowby nowfor a long(peri

12、od of)timein recent yearsin/during/over the past yearsin/during/over the three decades 1.现在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20

13、15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 done。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Summary1.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.J

14、ack _ by his boss for his devotion to work.They have found a good 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 wi

15、ll go home when my homework _.纸币已被使用了1000多年了。Paper money _ for over one thousand yearshas always been praisedhasnt been decidedhas been found巩固强化巩固强化has been finishedhas been used巩固强化巩固强化1.Windows_ of glass.A.made B.is made C.are made D.been made2.The house_ in 2020.A.is built B.is building C.was built D.used3.A coat can_ for keeping warm.A.be used B.is used C.been used D.used4.The League _ in May,1922.A.is founded B.was founded C.is built D.was builtMultiple ChoiceCCABThanks!