高三英语一轮复习情态动词的虚拟用法课件

情态动词情态动词情态动词属于助动词，表示说话人的情绪、态度、语气。导图情态动词分类推测虚拟属性情态动词五大属性Icanplaybasketball.Icanplaybasketball.She

canplaybaskestball.Canyouplaybasketball?Yes,Ican./No,Ican’t.1.不能单独作谓语

2.接动词原形

3.无人称和数的变化4.本身有含义5.否定在后导图情态动词分类推测虚拟属性(5种)情态动词分类cancould能（能力）也许可能必须不得不需要敢于havetoneeddaremustmaymightbeabletoshouldoughtto应该need和dare的双重用法need+dotodo情态实义neednotdodon't/doesn't/didn'tneedtododarenotdodon't/doesn't/didn'tdaretododare+dotodo情态实义判断dare/need的用法1.Ifyoudaresaythattoourteacher,Iwouldvoteforyou.()2.Shedoesn'tdaretoswimintheriver.()3.Youneedn'tgoifyoudon'twanttogo.()4.Heneeds

tofinishitintheevening.()情态实义情态实义导图情态动词分类(5组)推测虚拟属性(5)情态动词+havedone

推测

1.may/mighthavedone2.can’t/couldn’thavedone3.couldhavedone4.musthavedonesth1.may/mighthavedone过去可能做了某事其否定形式是：may/mightnothavedone过去可能没有做某事may/mighthavedone表示推测时，不能用于疑问句中Youmighthavereadaboutit.你也许读过的。2.can’t/couldn’thavedone过去不可能做过某事表示不相信或怀疑的态度Hecan’thavetakenitaway.他不可能把它带走了。3.couldhavedone过去可能做过某事此处不用canHecouldhavegonetoschool.他可能上学去了。4.musthavedonesth过去肯定做了某事对过去情况的肯定推测没有mustn’thavedone的结构其否定要用：can’t/couldn’thavedone（过去不可能做过某事）Hemusthaveattendedthepartylastnight.他昨晚上一定去参加了派对。表示推测过去某动作的可能性时，就表示可能性的程度而言：must最大could其次may更次之might最小导图情态动词分类(5组)推测（4种）虚拟属性(5种)情态动词+havedone

虚拟1.shouldhavedone2.oughttohavedone3.needhavedone

4.couldhavedone

5.mighthavedone6.wouldhavedone

1.shouldhavedone过去本应该做某事，却未做其否定形式为：shouldn’thavedone过去本不应该做，却做了你本来应该少吃点的。Youshouldhaveeatenless.2.oughttohavedone过去本应该做，却未做其否定形式：oughtn’ttohavedone过去本不该做，却做了我本应该在3.30之前离开这里。Ioughttohavelefthereby3.30.3.needhavedone过去本有必要做某事，但未做其否定：needn’thavedone过去本没必要做某事，却做了Youneedn’thavetoldthemagain.你本来不必再告诉他们的。4.couldhavedone过去本能够做某事，但未做表虚拟时，不能用can其否定：couldn’thavedone过去本做不成某事，却做了Youcouldhavedonetheworkbetter.你本可以把工作做得更好。5.mighthavedone过去本可以做某事，却未做其否定：mightnothavedone过去本可能没做某事，却做了Youdidn'tdotheworkwellthatday.Youmighthavedoneitbetter.那天你没有做好工作。你本可以做得更好。表示虚拟时，不能用may6.wouldhavedone过去本会做某事，却未做其否定为：wouldn’thavedone过去本不会做某事，却做了

如果你不来，我们早就被杀了。Ifyouhadn’tcome,wewouldhavebeenkilled.导图情态动词分类（5组）推测（4种）虚拟（6种）属性（5种）1.We_____thedifficultytogether,butwhydidn'tyoutellme?A.shouldfaceB.mightfaceC.couldhavefaceD.musthavefaceC2.Theroomisinaterriblemess;it____cleaned.A.shouldn'thavebeenB.can'thavebeenC.mayhavebeenD.musthavebeenB3.Thepatientscreamedinhissleeplastnight.He_____aterribledream.A.musthavebeenB.musthaveC.mustbeD.musthavehadD4.You____me