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1、情态动词用法归纳情态动词有can(could),may(might),must,haveto,shall(should),will(would),dare(dared),need(needed),等。情态动词无人称和数的变化；不能单独使用，必须与其后的动词原形构成谓语。一、can,could1)表示能力（体力、知识、技能）。Canyouliftthisheavybox?（体力）Marycanspeakthreelanguages.（知识）Canyouskate?（技能）2)表示请求和允许。CanIgonow?Yes,youcan./No,youcan’
2、t.3)表示客观可能性（客观原因形成的能力）。They’vechangedthetimetable,sowecangobybusinstead.Thishallcanhold500peopleatleast.4)表示推测（惊讶、怀疑、不相信的态度），用于疑问句、否定句和感叹句中。Canthisbetrue?Thiscan’tbedonebyhim.Howcanthisbetrue?二、may,might1)表示请求和允许。may语气更委婉，否定回答时可用can’t或mustn’t。MayIsmokeinthisroom?No,youmustn’t.Ma
3、y/MightItakethisbookoutoftheroom?Yes,youcan.(No,youcan’t/mustn’t.)2）用于祈使句，表示祝愿。Mayyousucceed!3)表示推测、可能性（不用于疑问句）。Hemaybeverybusynow.三、must1)表示必须、必要。Youmustcomeintime.在回答引出的问句时，如果是否定的，不能用mustn’t（禁止，不准），而用needn’t（不必）.Mustwehandinourexercisebookstoday?Yes,youmust.No,youyouneedn’t.3)
4、表示推测、可能性（只用于肯定的陈述句）1．You’reTom’sgoodfriend,soyoumustknowwhathelikesbest.2．Yourmothermustbewaitingforyounow.一、选用情态动词can,can’t,must填空。1．“Iuseyourrubber,Bill?”“Sorry,Idon’thaveone.AskMary.Shemay(可能)haveone.2．“yousayitinEnglish?”“Sorry,I____.IsayitinEnglish?No,youneedn’t.YousayitinC
5、hinese.3.“_________________Ilistentothemusic?”Yes,you______________.Butyou______________waitaminute.4.Youcallmewithyourmobilephoneontheplane.二、选择填空。()1.—MayItakethisbookout?—No,you___.A.can'tB.maynotC.needn'tD.aren't()2.“Idohomeworkfirst?”“Yes,you.”A.Must;mustB.Can;areC.Must;can
6、D.Am;can()3.—MayIchangethefilmhere?—No,youdothatinthesunshine.A.needn’tB.don’thavetoC.can’tD.maynot(()4.—___Itakethenewspaperaway?—No,youmustn't.You____readitonlyhere.A.Must;canB.May;canC.Need;mustD.Must;must()5.—______Itakemycatwithmeonthetrain?No,you______.A.Could,won’tB.Must,
7、mustn’tC.May,mustn’tD.Can,needn’t()6.You______showyourpassattheentranceunlesstheguardasksyouforit.A.mustn’tB.can’tC.needn’tD.won’t()7.You______watchTV,butyou_____finishyourhomeworkfirst.A.must,canB.need,canC.may,mustD.can,may()8.You’dbettertakeamapwithyou,oryou____loseyourway.A.
8、canB.mustC.shouldD.may三、翻译下列句子。1)你可以把自行车放在屋子的后面
