Module 12 语法 情态动词表推测

情态动词情态动词表示猜测在情态动词家族中，有些成员可以表示“猜测”，看下面的例句，注意黑体加下划线的词，然后用can,may,might,must,can’t,maynot或mightnot补全“结论”中所缺内容。1.—WhereisTom?—I’mnotsure.ButIthinkhemaybeathome.2.ThemanagertoldmeImighthaveadayoff.3.Shemightnotcometomorrow.4.Canthisbesure?5.Thelightison.Hemustbeathome.6.Thedoorislocked.Hecan’tbeathome.由以上例句可以看出：1.表示肯定推测的情态动词有：____(一定；准是），_________（也许；可能；或许）。2.表示否定推测的情态动词有：_____________（不可能），___________，（也许不；或许不）。3.______________表示推测时一般不用于肯定句，_____________，_____________和________________表示推测时一般不用于疑问句。4.______________与_____________两者表可能性都较小，此时无时态之分，但当主句谓语动词为过去式时，则要用__________。1.Thewatchisn’tyours.Whose______________itbe?2.You’dbettergoandaskMissLiu.She_________________knowhowtosearchtheInternet.3.Jim_____________beathomebecausehephonedmefromtheparkjustnow.4.MissLisaidshe________________comelate.5.—IsawLilyonmywayherejustnow.—It____________beher.Shehasjustbeenabroadfortwodays.1.can可以表示对现在或将来的推测，意为“会，可能”。通常用于肯定句和疑问句。用于否定句时，can’t表示“不可能”；用于否定句时，can比could表示的“可能性”更大。例如：1.Whosentthepresent?Canitbeyourbrother?2.Itcan’tbemybrother.HeisstillinFrance.情态动词表示推测Hecouldbeinpain.①Youmustcometoschoolontime.②Youmustn’tswimhere.Thewaterissodeep.③Theymustbegoodfriends!Theyoftengotoschooltogether.must意思是“必须”mustn’t表示禁止，不准…must表示猜测，意思是“一定，肯定”情态动词表推测Sheverytired,shefellasleepwhileshewasdoinghomework.mustbe1.—FiftydollarsforsuchaT-shirt!You____bejoking!—I’mserious.It’smadeofsilk.A.mustB.needC.mayD.canA2.情态动词can的用法（2）can表示能力，意思是“会，能够”,同义词是beableto①Hecandriveacarwhenhewas18.②Shecanbeathomeatthemoment③Thiscan’tbetrue.这不可能是真的。（3）can表示猜测，意思是“可能”，cann’tbe不可能.1.—Isthatyourteacher?—That_____beMr.Wang.HehasgonetoJapanwithhiswife.A.can’tB.mustn’tC.maynotA3.—IsthatgirlunderthetreeMary?—No,that______beMary.SheisinNewYork.A.canB.mustn’tC.can’tC4.—IsMariaknockingatthedoor?—It____beher.SheisinAustralianow.A.maynotB.needn’tC.mustn’tD.can’tD5.—You_____behappywiththestrongpublicsupportyou’vereceived.—Yes,you’reright.I’mreallyexcited.A.mayB.canC.mustD.need6.Thatman_____bemyEnglishteacher.HehasgonetoCanada.A.needn’tB.mustn’tC.can’tCC1.—Mybrotherwonthefirstprizeinspeechcompetition.—Congratulations!You____beexcitedaboutthat!A.needB.mustC.wouldD.can2.Theladyinthisphoto_____beoverfifty!Shelookssoyoung!A.mustn’tB.mustC.can’tD.canBC3.ThistoyMickeyMouse____beAmy’s.She’stheonlykidatthepicnic.A.mustB.canC.needD.can’tA4.—You____beexcitedthatyou’regoingbacktoyourhometownsoon.—Yes,Ican’twaitanylonger.A.shallB.canC.needD.mustD1.—Whoisthemanoverthere?IsitMrLi?—No,it____behim.MrLiismuchtaller.A.mustn’tB.maynotC.can’tD.needn’tC2.—Haveyoudecidedwheretogoforyoursummervacation?—Notyet.We____gotoQingdao.Itisagoodplaceforvacation.A.mayB.shouldC.needD.mustA3.—_________Iborrowyourhistorybook?—Sure.Hereyouare.A.MustB.MayC.NeedD.WillB1.You_______betiredafterworkingforeighthourswithoutarest.A.canB.mayC.mustD.need2.You________doitifyoureallydon'twantto.A.needn’tB.mustn’tC.can’tD.couldn’tAC1.Susan’sparentshaveboughtalargehousewithaswimmingpool.It___beveryexpensive.A.mustB.canC.mustn’tD.can’t2.You_____goandaskMeimei.She____knowtheanswer.A.must;canB.must;mayC.need;canD.can;mayAD