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1、高一英语学案一一情态动词制作：匡霞审核：张亮概念：本身有意思，无人称和数的变化，不能独立作谓语，必须和后面的动词一起构成谓语。t青态动i司包括：can,could,beableto,may,might,shall,should,oughtto,hadbetter,will,would,usedto,must,haveto,need(needn't),dare(daren't)等。情态动词的用法：1.can,could,beableto⑴表示能力can/could表示现在/过去的能力。beableto能力，
2、表示”经过努力而能够”，有更多的时态如将来时、完成时等，而can没有。♦过去时态was/wereableto可作”设法做成某事”讲,相当于或can/could没有这种用法。Hecanrunthe100msprintin11seconds.Canyouplaytheviolin?Yes,Ican.ButIcouldn^tlastyear.Hewillbeabletoskateaswellasyouinanothermonth.Withthehelpofthefiremen,theywereabletolea
3、vetheburninghouse•当表示“没看做成某事冷即用否定式时,wasn't/weren*tableto与couldn*t没有区别，可通用.（2）可能性can/could表推测，多用于疑问和否定句中。（could也可用于肯定推测）女口：CanitbeSusanatthedoor?Itcan"betrue.Hecannothaveleftschool,forherbikeisstillhere.▲can还可表示一时的情况“有时可能会”Itcanbequitecoldhereatnight・这里的夜晚
4、有时可能很冷。▲couldhavedonesth.除了表对过去的推测，还可表示"本来能够做”(实际上没做)Hedidnotregretsayingwhathedidbutfeltthathecouldhaveexpresseditdifferently.Acan/could表示推测时，反意疑问句根据动词的实际时态变化.Hecan'tbesoserious,?（3）表示请求、允许1）请求允许can,could,Can/couldIhaveacupoftea?CouldIaskyousomething,ify
5、ouTenotbusy?2）允许某人做某事回答用can,不用could-CouldIuseyourcar?-Yes,you・/-No,you.部分特殊句式：©cannot/canneve匚.丄。。或cannot/canneve匚••enough②cannothelpdoing...cannothelpbutdo.../cannotbutdo…cannotwaittodo...2.maymight（1）请求、允许（表回答允许时通常用may不用might表请求时might比may语气更委婉些）Can/may/
6、couldIhaveacupoftea?Youmaygohomenow,Susan.苏珊，你现在可以回家了.—MayIuseyourbike?—No,you•PHhaveclassesthisafternoon./—No,youmaynot•（这里不说：No,youcouldrft）—MightItroubleyouforalight?一Yes，youmayindeed.（2）may可用于表示祝愿MayyouhaveahappyNewYear!Mayyousucceed!⑶may/might也可表把握性不
7、大禹推测，一般不用于疑问句中。might的可能雇比may小。Hetoldmehemightbelate.Wstoolate.Ithinkhemayhavegonetobed.固定结构maywell(有良好的理由…很可能……)might/mayaswell（倒不如）Lizamaywellnotwanttogoonthetrip——shehatestraveling.Sincewedon^tknowwheretofindherandIamsureshewillcomeback,wemayaswellstayw
8、hereweare.Acan,could,may(might)还可用于目的状语从句中Theytoldustokeepquietsothatwemightnotdisturbothers.Jimgotupearlyinorderthathecouldcatchtheearlybus.1.musthaveto(1)“必须”must表主观，haveto表客观。IthinkallthestudentsmustlearnEnglishw
