Unit 7 Teenagers should be allowed to choose their own clothes.Section A (Grammar focus~4c) 课件(共23张ppt（2024年新版）.pptxVIP

GrammarFocusUnit7Teenagersshouldbeallowedtochoosetheirownclothes.

Review主动语态：表示主语和谓语之间是_________关系被动语态：表示主语和谓语之间是_________关系英语的语态是通过动词形式的变化表现出来的。英语中有两种语态：主动语态和被动语态。Wecleantheclassroomeveryday.Theclassroomiscleanedbyuseveryday.主动被动被动语态的谓语动词结构为：be+动词的过去分词be有时态和人称的变化

Shewatersflowerseveryday.

ThomasEdisoninventedtheelectricbulb.

Weshouldcleantheclassroomeveryday.

母亲节每年都被我们庆祝。母亲节去年被我们庆祝。我们已经学过：一般现在时的被动语态一般过去时的被动语态MothersDayiscelebratedbyuseveryyear.MothersDaywascelebratedbyuslastyear.一般现在时的被动语态is/are+动词过去分词一般过去时的被动语态was/were+动词过去分词

3、情态动词的被动语态：情态动词+be+动词的过去分词青少年应该被允许选择自己的服装。Teenagers__________________tochoosetheirownclothes.shouldbeallowed

Idon’tthinksixteen-year-oldsshouldbeallowedtodrive.Iagree.Theyaren’tseriousenough.Doyouthinkteenagersshouldbeencouragedtomaketheirowndecisions?Teenagersshouldnotbeallowedtohavepart-timejobs.No,Idon’tagreewiththis.Teenagersaretooyoungtomaketheirowndecisions.Idisagree.Theycanlearnalotfromworking.Ifyoudon’tuseaflash,thenitmaybeOK.Doyouthinkwemaybeallowedtotakephotosifwedon’tuseaflash?Canyoufindthepassivevoicefromthisform?Whatelsecanyoufind?含有情态动词的被动语态情态动词+be+动词过去分词

情态动词can/couldmay/mightwill/wouldshall/shouldmustoughtto1.情态动词无时态和人称的变化；2.情态动词后动词变回原形。

含情态动词的被动语态句子结构

翻译：否定句:一般疑问句青少年们应该被允许选择自己的衣服。Teenagersshouldbeallowedtochoosetheirownclothes.Teenagersshouldnotbeallowedtochoosetheirownclothes.Shouldteenagersbeallowedtochoosetheirownclothes?

含情态动词的被动语态易错点

易错点一：表达否定时，“not”接在情态动词后。Paperandwaterwastedbypeople.A.willbenotB.willnotbeC.shouldbenotD.shouldnotbe2.In2050,2Gusedintheworld.A.willbenotB.willnotbeC.shouldbenotD.shouldnotbe

易错点二：判断下列句子是否正确？正确（T）错误（F）情态动词+主语+be+d