高中英语语法情态动词公开课课件.ppt

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1、TrysomeTongueTwistersCanyoucanacanasacanercanacan?2.Howmuchwoodwouldawoodchuckchuckifawoodchuckcouldchuckwood?3.Howmanycookiescouldagoodcookcookifagoodcookcouldcookcookies?Whatkindofverbaretheunderlinedwords?你可以像装罐工人那样装罐头吗?如果一只土拨鼠会扔木头,那么会扔多少木头呢?如果一个好的厨师能做小甜饼，那么他能做多少小甜饼呢？Theyaremodalver

2、bs.ModalverbsWelcometoourEnglishclass一.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.Makesuggestions（提出建议）7.Makeoffers（提供帮助）8.Giveadvice（提出意见）1.Ability(能力):LiuXiangcanrunthe110mhurdleracewithin13seconds.can/could:1.can一般表示

3、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。LearningEnglish_____bedifficult.canMancannotlivewithoutair._______Iuseyourbike?Cancan/could:2.在疑问句中，用could可表示请求，语气较委婉。—____Ihavethetelevisionon?—Yes,you_____./No,you_____CouldHeasksifhe____smokehere.couldcancan’t/I’mafraidnotcan/could:3.表示惊异、怀疑、不相信的态度。（主要用在否

4、定句、疑问句或惊叹句中）He’ssuchanicepersonthathe______committhecrime!can’t你怎么会如此地粗心！Howcanyoubesocareless!__________thisbetrue?Cancan/could:4.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.I’msotired!Ihavetodothetrainingforatleast10hoursaday!2.Obli

5、gation(义务):…yethemustworkhardtowinthegoldmedal.AlthoughLiuXiangissogiftedinhurdlerace…注意：must可表示“坚持，一定要”（常用于固定句型：ifyoumustdosth.如果你非得要做某事）如果你真的要走，那就悄悄离开。Ifyouleave,doitquietly.mustAttention:Yourmotherbringsyouupandtakesgoodcareofyou,sowhensheisold,you___lookafterherinreturn.A.canB.mayC

6、.havetoD.mustShiDongpengmightwinamedalattheOlympicGames.Althoughthechanceofwinningamedalissmall,I’lltrymybest!3.Certainty(可能性):Attention:1.He_____beathome.2.He_____beathome,forhejustcalledmefromhishome15secondsago.A.mayB.mightC.mustA.mayB.mightC.must情态动词表示猜测是高考热点之一：must>should>can>coul

7、d>may>might（可能性）情态动词+不定式完成式“责备”等多种意义。needhavedoneneedn’thavedoneshoudn’t/oughtn’ttohavedoneshould/oughttohavedonewouldratherhavedone注意：对于现在和将来的推测用“情态动词+动词原形”，对于过去的推测用“情态动词+不定式完成式”。Eg:may/mighthavedone可能已做了can’thavedone不可能做了本需要做但没做本不必做但做了本不该做但做了本该做但没做本想做但没做4.Permission(允许):MayIeatKFCi