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1、ModalVerbs情態(tài)動詞定義：表示說話人的情緒、態(tài)度或語氣的動詞叫情態(tài)動詞。情態(tài)動詞語法特征1）情態(tài)動詞不能單獨作謂語，沒有人稱，數(shù)的變化，即情態(tài)動詞第三人稱單數(shù)不加-s。2）情態(tài)動詞的否定式是在情態(tài)動詞后面直接+not。3）情態(tài)動詞的疑問式是把情態(tài)動詞提到主語前。主要情態(tài)動詞8can,could（beableto）may,mightmust（haveto）will,wouldshall,shouldoughttoneeddare8情態(tài)動詞的用法I.can/could1.___Can___y
2、ouspeakJapanese?Justalittle.2.Onlythejudge___can___saveherfromprison.3.I___could___driveacarbeforeIleftmiddleschool.4.ItwassodarkthatI___could___seenothing.Note:表能力、有權(quán)力（could是can的過去式）5.--___Can/Could___Igohomenow?--Yes,youcan.–No,youcan’t.6.--___Can/
3、Could___IspeaktoAndrew?7.You___can’t___（not）smokehere.Note:（口語）允許、請求，表可以(could非can的過去式，表委婉)8.It___can___/could____beverycoldhere,eveninspring.9.Sheisclever,butshe___can___/could___bedullsometimes.Note:（表示偶然現(xiàn)象發(fā)生的可能性）有時會，時而可能10.It___can’t___/couldn’t__
4、_(not)bemyfather.Heisabroadnow.81.Thereissomeoneoutside.Who___can___itbe?2.You__can’t/couldn’thaveseenhim__(notsee)him.Hewasnotthere.3.She__can’t/couldn’thavebeen___(notbe)morethansixthen.4.He__can’t/couldn’thavefinished___(notfinish)theworklastnight
5、withoutyourhelp.Note:表推測（否定、疑問句）5.He__couldhavetold__(tell)metheanswerbutherefusedto.Note:過去本能做而沒有做6.You_cannot/cannever_________dotheworktoowell.7.You_cannot/cannever__becarefulenoughinyourstudy.Note:cannot…too;cannever...too;cannotenough再…都不為過；越…越好
6、can&beableto區(qū)別：1.can只有兩種時態(tài)現(xiàn)在時can&過去時couldbeableto有各種時態(tài)2.用于一般所具有的能力，可以互換，但是當(dāng)表示成功做到時，通常用beableto或manageto1.He_can/isableto_writemusic.2.Weshall__beableto__finishtheworksoon.3.Ihaven’t_beenableto_findthebook.4.He_could/wasableto__swimlikeafishwhenhewasy
7、oung.5.ItalkedwithherforalongtimeandfinallyI__wasableto_makeherbelieveme.6.Thefirespreadthroughthebuildingquicklybuteverybody___wasableto/managed___toescape.I.may/might1.--__May___Ileavenow?--Yes,you__may__./Yes，please.--No,you__maynot/can’t/mustn’t_
8、__.2.Heaskedifhe_might_____usethephone.3.Westartearlysothatwe_may/might___arriveintime.Note:（允許、請求）可以84.__May__youbehappyallyourlife.Note:祝、愿5.Johnisabsent.He__may/might_____beill.6.It_may/might______raintomorroworit__may/might_____bemerelycloudy.7.I
