Unit8情态动词表推测精讲精练 人教版英语九年级

2021人教版英语九年级Unit8情态动词表推测精讲精练概述：情态动词除了常规的用法，推测的用法也是常考点。本单元我们学习的表示推测的情态动词有：can,could,may,might,must。情态动词表示推测的意义和用法：肯定句：must一定表示有把握的肯定推测may/might/could也许、可能表示没有把握的推测否定句:can’t/couldn’t不可能表示有把握的否定推测maynot/mightnot可能不表示不太有把握的否定推测疑问句：can/could可能表示推测例句：Hemustbetiredafterthelongtrip.长途旅行他一定累坏了。Shemaybeintheoffice.她也许在办公室。Thatmancan’tbeournewteacher.Heismuchshorter.那个人不可能是我们新来的老师。他矮的多。Whatcoulditbe?它会是什么呢？注意：（1）情态动词表示推测时，无语态变化区别，只有语气差别。从强到弱依次是：must>can>could>may>might(2)含有must的句子表示推测时，变为否定句时，用can’t。三，不同形式的情态动词表示不同的意义：1.情态动词+动词原形：表示对现在事情的推测。2.情态动词+be+doing:表示对正在发生的事情的推测。3.情态动词+have+过去分词:表示对过去情况的推测。如：Thegroundiswet.Itmusthaverainedlastnight.地面是湿的。昨晚一定下雨了。精选习题练习单项选择。-Wow...anothergift.What’sinthebox?-I’mnotsure.It_____beatoydoll.A.may B.must C.willD.should-Willyouanswerthedoor?It___bemother.-Sorry,I_____.I’mbusy.A.may,mustn’t B.can,can’t C.may,can’t D.can,mustn’tLook!Thelightintheofficeisstillon.MrBrown____beatwork.must B.can C.need D.couldTheman___beadoctorinthishospital,butIamnotsure.must B.would C.can D.mightI___belate,sodon’twaitformetostartthemeeting.mustn’t B.needn’t C.need D.may-Howdeliciousthefoodis!Didyourmothercookit?-It____beher.Shehasbeeninapoorcountrysidetohelpthepeoplethere.A.can’t B.won’t C.mustn’t D.needn’t7.-Whosebookisthis?-It____beLucy’s.Hernameisonthecover.A.must B.can’t C.need D.mustn’t8.Thereisaknockatthedoor.It____mysister.It’stimeforhertobebackhome.A.maybe B.maynotbe C.mustbe D.mustn’tbe9.Fromthetopofthehill,people_____enjoythesightofthegarden.A.haveto B.need C.should D.can10.Don’tworry.Ourschoolhasrealizedtheproblem.I’msurethere____begoodnewsforussoon.A.can B.must C.should D.need二，用must,may,might,can’t填空。1.Thebeautifuldress_____beLaura’s.Itistoolong.2.Thesoccerball____beTom’sorMike’s.Theybothlikeplayingsoccer.3.Thestorybook____behis.Ithashisnameonit.4.-WhereisAmy?-She____beinherroom,butI’mnotsure.5.Ican’tfindmyhomework.It_____beleftathome.三，根据短文内容，从方框中选择恰当的情态动词填空。可重复使用。maymightmustcan’tcouldTwopolicemenwerehavingacupofcoffeeatfive,astheyusuallydid,whenthedoorbellrang.“That_____beMrsBrown.Iwasexpectingherthisevening,”saidonepoliceman.“No,it_____beher.Shecalledthismorningandsaidshewouldnotbeabletomakeitthisevening.Shealsosaidshe______cometomorrowevening,butshewouldcallagainanywaytoconfirm(确认)it,”repliedtheotherpoliceman.“Well,that’sverystrange.MrsBrown______havecalledthismorningbecauseIwaswithheralldaytillweleftforlunch.It_____havebeensomeoneelsepretending(假装)itwasher.”That’stosay,MrBrown_______beindangernow.四，中考真题集锦（2021吉林）1.-Whosedictionaryisthis?-It____beJeff’s.Look!HisnameisonPageOne.A.must B.need C.can’t(2021新疆）2.-IsawMrLiinhisofficejustnow.-No,it____behim.Hehas______Guangzhouandwillbebackintwodays.mustn’t,gonetoB.mustn’t,beentoC.can’t,beento D.can’t,goneto(2020福建）3.-IsthisbookLinda’s?-It_____behers.Sandy’snameisonthecover.A.can’t B.mustn’t C.needn’t(2020怀化)4.-Where’sJane?-I’mnotsure.She_____inthelibrary.A.mightbe B.mustbe C.can’tbe(2020滨州）5.-Onmywaytothebookstore,IsawMaryhangingoutwithherfriends.-It_____beher.ShehasgonetoBeijing.can’t