英语人教版九年级全册unit 7 grammar.ppt

SectionA(GrammarFocus-4c),Unit7Teenagersshouldbeallowedtochoosetheirownclothes.,DoyourparentsallowyoutowatchTV?Yes,theydo.YouareallowedtowatchTV.,allowsb.todosth.beallowedtodosth.,Step1准备与热身(preparation),Doyourparentsallowyoutoexercise?Yes,theydo.Youareallowedtoexercise.,GrammarFocus,根据课本内容，完成下列句子。,1.我认为不应该允许十六岁的孩子开车。Idontthinksixteen-year-olds_todrive.2.我同意。他们还不够严谨。Iagree.Theyarentseriousenough.,shouldbeallowed,Step2呈现与输入(Presentation),3.你认为应该鼓励青少年去自己做决定吗？Doyouthinkteenagers_tomaketheirowndecisions?4.不，我不认同这个。青少年还太小不能自己做决定。No,Idontagreewiththis.Teenagersare_maketheirowndecisions.,shouldbeencouraged,tooyoungto,5.不应该允许青少年去做兼职。Teenagers_tohavepart-timejobs.6.不，我不同意。他们可以从工作当中学到很多。Idisagree.Theycan_alot_working.,learnfrom,shouldnotbeallowed,7.你认为如果不用闪光灯的话可以允许我们拍照吗？Doyouthinkwe_totakephotosifwedontuseaflash.8.如果不用闪光灯的话，那么拍照是可以的。Ifyoudontuseaflash,thenitmaybeOK.,maybeallowed,温故在英语中，动词有两种语态，即主动语态和被动语态。主动语态表示主语是动作的执行者，被动语态表示主语是动作的承受者。在前面两个单元我们已经学习了一般现在时的被动语态和一般过去时的被动语态，它们的结构为：am/are/is+及物动词的过去分词,were/was+及物动词的过去分词。,含有情态动词的被动语态,知新本单元我们主要了解含有情态动词的被动语态。它的结构是什么呢？观察下面例句中含情态动词被动语态的各种形式，然后补全结论中所缺的内容。,【例句】1.Manytreesshouldbeplantedinthemountains.应该在山上种许多树。2.Youcantakethisbookhome.（改为被动语态）Thisbookcanbetakenhome(byyou).3.Thisproblemcantbeworkedoutveryeasily.这道题轻易算不出来。4.Musttheworkbedoneatonce?这项工作必须立即完成吗？,【结论】A.含有情态动词的被动语态的结构为：情态动词+_+及物动词的_。B.含有情态动词的主动语态变为被动语态时，要把主动语态的_变成被动语态的主语。C.变为否定句时只需要在情态动词后加_。D.变为一般疑问句时只需把_提到句首。,be过去分词,宾语,not,情态动词,【运用】.选择最佳答案。()Youngtreesshould_everyyear.A.beplantedB.plantedC.plant,A,.按要求完成下列各句，每空一词（含缩写）。1.Wemustdotheworkrightnow.（改为被动语态）_rightnow.2.Teenagersshouldbeallowedtogooutwiththeirfriendsonschoolnights.（改为否定句）Teenagers_togooutwiththeirfriendsonschoolnights.,Theworkmustbedone,shouldntbeallowed,3.Abookshouldbereadeachmonth.(改为一般疑问句)_eachmonth?,Shouldabookberead,4aRewritethesentencesaccordingtotheexample.1.Youmustcleanyourbedroomeveryday.Yourbedroommustbecleanedeveryday.2.Parentsshouldencourageteenagerstodosocialworkfortheircommunity.Teenagers_.3.CanLucydoherhomeworktomorrowinstead?Can_?,shouldbeencouraged(bytheirparents)todosocialworkfortheircommunity,thehomeworkbedone(byLucy)tomorrowinstead,n.社区，社团,Step3练习与体验(Practice),4.DoyouthinkwemustkeepteenagersawayfromtheInternet?Doyouthinkteenagers_?5.Parentsshouldgiveteenagerschancestomaketheirowndecisions.Teenagers_,mustbekeptawayfromtheInternet,shouldbegivenchancestomaketheirowndecisions.,keepawayfrom避免接近，远离,n.机会，可能性,自己做决定,Shouldteenagers_(ask)tomoveoutwhentheystartworking?InmanyWesterncountries,teenagers_(allow)tomoveoutateighteen.Theirparentsbelievethattheyshould_(educate)totakecareofthemselvesfromayoungage.Thisway,whenthey_(start)workingtheycanmanagetheirownlives.,4bFillintheblankswiththecorrectformsofthewordsinbrackets.,beasked,areallowed,beeducated,start,v.教育；教导,v.完成；应付,Step4运用与生成(production),However,inmostAsiansocieties,itisnotcommonforteenagersto_(move)out.Chineseparentsbelievethatitisbetterforchildrentolivewithparentswhocan_(take)careofthem.Buttheyoungshouldthenlookaftertheirparentsastheygetolder.ThatiswhymanyChineseadults_(continue)tolivewiththeirparents.,move,take,continue,n.社会,Step5.巩固与提高（Progress）,探究点一Idontthinksixteen-year-oldsshouldbeallowedtodrive.我认为16岁的孩子不应该被允许开车。主语+should+动词原形+其他1.should+动词原形表示应该做某事以及承担的责任或义务（常用于纠正别人）。e.g.Heshouldhavebeenmorecareful.他应该更小心一点才是。Youshouldworkharderandpasstheexam.你应该更加努力，并通过考试。2.should的否定式为shouldnot,简略形式为shouldnt。e.g.Sheshouldntbeworkinglikethat.Sheisstillsoweak.她不应当那样干。她身体还很虚弱。Youshouldntdrinkanddrive.你不应该酒后驾车。2.should的疑问句直接将should置于主语前。e.g.ShouldIcallhimandapologize?我是不是应该打电话向他道歉？,探究点二Yourbedroommustbecleanedeveryday.你必须每天打扫卧室。mustbecleaned是一个含有情态动词的被动语态结构。情态动词的被动语态结构为：情态动词（can,may,must,should等）+be+动词的过去分词。（1）肯定句：主语+情态动词+be+过去分词+其他。e.g.Treesshouldbewateredoften.树应该常被浇水。（2）否定句：主语+情态动词+not+be+过去分词+其他。e.g.Treesshouldntbewateredoften.树不应该常被浇水。（3）一般疑问句：情态动词+主语+be+过去分词+其他？e.g.Shouldtreesbewateredoften?树应该常被浇水吗？（4）特殊疑问句：特殊疑问词+情态动词+主语+be+过去分词+其他？e.g.Howoftenshouldtreesbewatered?树应该多久被浇一次水？,针对训练（）1.Sixteen-year-oldsshouldnt_togotoanInternetbar.A.beallowedB.beallowingC.allowD.areallowed（）2._middleschoolstudentsbeallowedtousemobilephonesatschool?A.DoB.DidC.ShouldD.Are（）3.DearEric,yourroomistoodirty.Itshould_rightaway.Sorry.Illdoitnow.A.iscleanedB.becleanedC.wascleanedD.cleaned,A,C,B,Homework,1.Youandyourfriend