《高中情态动词》PPT课件.ppt

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1、Unit2GrammarandUsageModalverbsJack—Ihavegoodnewsforyou!Rose—What?Jack—Theeducationaldepartmenthascarriedoutrulestoreducestudents'toomuchstudyload.Rose—Really?Ifso,Idon’thavetostayuplatetodosomuchhomeworkandmymommayallowmetoplaycomputergames.Jack—ThebestthingIthinkisthatIcanhavemoresp

2、aretimetotakeexerciseafterclass.Rose—Sure.Bytheway,whoisyourfavoritesportsstar?Jack—LiuXiang,Ishouldsay.Rose—Tellmesomethingabouthim.Jack—Well,maybeIcanshowyousomephotos.Weusemodalverbstotalkabout:1.Ability（能力）2.Obligation（义务）3.Certainty（可能性）4.Permission（允许）5.Makerequests（提出请求）6.Make

3、suggestions（提出建议）7.Makeoffers（提供帮助）8.Giveadvice（提出意见）情态动词的基本用法特点1）情态动词不能表示正在发生或已经发生的事情，只表示期待或估计某事的发生。2）情态动词除ought和have外，后面只能接不带to的不定式。3）情态动词没有人称，数的变化，即情态动词第三人称单数不加-s。4）情态动词没有非谓语形式，即没有不定式，分词，等形式。只作情态动词的can/could,may/might,oughtto,must可情态可实义的need,dare可情态可助动词的shall/should,will/would相当于情

4、态动词的haveto,usedto1.Ability(能力):LiuXiangcanrunthe110mhurdleracewithin13seconds.can/could:1.can一般表示与生俱来的能力或者一种客观可能性,还可以表示请求和允许。3.LearningEnglishcanbedifficult.2.Mancannotlivewithoutair.7.CanIuseyourbike?1.Thegirlcandanceverywell.4.Youcanhurtyourselfifyouplayinthestreet5.Everyonecanmake

5、mastikes6.ItisusuallywarminmyhometowninMarch,butitcanberathercoldsometimes.Thebiggestproblemformostplants,which____justgetupandrunawaywhenthreatened,isthatanimalsliketoeatthem.(湖南2007)A.shan’tB.can’tC.needn’tD.mustn’tTheWorldWideWebissometimesjokinglycalledtheWorldWideWaitbecauseit__

6、____beveryslow.A.ShouldB.mustC.willD.cancan/could:could可表示请求，语气较委婉。—____Ihavethetelevisionon?—Yes,you_____./No,you_____CouldHeasksifhe____smokehere.couldcan/maycan’t/I’mafraidnotAttention:can/could:2.表示惊异、怀疑、不相信的态度。（主要用在否定句、疑问句或惊叹句中）He’ssuchanicepersonthathe______committhecrime!can’t

7、Howcanyoubesocareless!Canthisbetrue?can/could:3.cannever/can’t……too表示“无论怎样…也不过分”，“越…越好”。你过马路的时候再小心也不为过。Youcan’tbetoocarefulwhilecrossingtheroad.4.cannothelpdoing.../cannothelpbutdo.../cannnotbutdo...“禁不住；不由得；不得不”。1）IcannothelpadmiringthepicturewheneverIlookatit.2）Whenaclosefrienddies

8、，youcannotbu