必修二 Unit 3 语法 现在完成时被动语态.ppt

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1、ThePresentPerfectPassiveVoice现在完成时的被动语态GrammarThissongbychildrenThesebooksbygirls.1一般现在时(simplepresenttense)的被动语态：S(主语）+am/is/are+done(过去分词)Thesportsmeetinginourcitylastyear.2一般过去时(simplepasttense)的被动语态：S+was/were+done(过去分词)isoftensungareoftenborrowedwasheld复习各时态（tense)的被动语态(pa

2、ssivevoice)：Thisworkeasily.3情态动词(Modalverb)的被动语态：S+can/may/must/should+be+doneManybuildingsinmyhometown.4一般将来时(futuretense)的被动语态：S+willbe+donewillbebuilt复习各时态（tense)的被动语态(passivevoice)：canbedone1helphelpedhelpedV原形过去式过去分词2changechangedchanged3studystudiedstudied4planplannedplan

3、nedbegbeggedbeggedstopstoppedstopped5givegavegiven动词的过去式和过去分词规则：1+ede+dyi+ed重读闭音节，末尾只有一个辅音字母，双写辅音字母+ed动词的过去式和过去分不规则复习：写出下列动词的过去式和过去分词helpchangestudyplanbegstopgive1OvertimeIhavebeenchangedquitealot.2FirstasaPCandthenasalaptopIhavebeenusedinofficesandhomessincethe1970s.3…Ineverf

4、orgetanythingIhavebeentold!4Sincethe1970smanynewapplicationshavebeenfoundforme.5Ihavealsobeenputintorobotsandusedtomakemobilephones…6IhaveevenbeenputintospacerocketsandsenttoexploretheMOonandMars.Discoveringusefulstructuresfromthepassageonp18:现在完成时的被动语态现在完成时的被动语态表示动作发生在过去,到现在已经

5、完成或对现在仍有影响,其构成是:have/hasbeen+done。例如：1.Thedirtyclotheshavebeenwashed.脏衣服都已经洗了。2.Theplanhasbeenstudiedbytheexpertsforthreetimes.这项计划已经由专家研究过三次了。现在完成时的被动语态表达以下两个概念：1.说话时已经完成的动作或出现的结果。2.主语是行为动作的承受者，在使用现在完成时的被动语态时要注意以下两点：过去分词前有两个助动词have/has和been。2.必须表示被动。Ihavebeentoldaboutitmanytim

6、es．Thebridgehasjustbeenbuilt．1.现在完成时被动语态肯定句句型：主语+have/hasbeen+过去分词Hermotorbikehasbeenstolen.2.现在完成时被动语态否定句句型：主语+have/has+not+been+过去分词Thetaskhasnotbeenfinishedyet.Manyskilledworkershavenotbeentrainedinthecompany.Thepresentperfectpassivevoice(肯定句、否定句:3.现在完成时被动语态一般疑问句句型：Have/Has+

7、主语+been+过去分词...?Hasanewcomputerbeenbought?HavetheybeensentabroadtostudyEnglish?4.现在完成时被动语态特殊疑问句句型：疑问词+have/has+主语+been+过去分词...?Wherehasthecarbeenrepaired?Whohavebeenhelpedbythenewcomputer?Howmanybuildingshavebeenbuiltinthisschool?Thepresentperfectpassivevoice(疑问句）:注意:副词的位置often

8、,usually,always,never,hardly,seldom等副词置于have/has和been中