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1、,单元语法小专题(GrammarFocus)语法精讲.情态动词表示推测的用法一、情态动词表示推测的三种句式1.在肯定句中一航用must(一定),may(可能).might/could(也许,或许)。e.gHemust/may/mightknowtheanswertothisquestion.他一定/可能/也许知道这个问题的答案。2.枣定何巾用qnlt/cotitii(不可能亢aynotmightnot(可能中)。e.g.Itcant/couldntbetheheadmaster.HehasgonetoAmerica.不可能是校长,他去美国了。Hemaynot/mightnotknowthesc
2、ientist.他也许不认识邢位科学家。1区/BA王人3.疑问句中用can/could(能2)e.g.Couldhehavefinishedthetask?他可能把任务完成了吗?Canhebeathomenow?他现在能在家吗?以上三种句式中情态动词的语气按程度都是依次递凑的。might,could并非may.can的过去式,而是表示语丿绞为委婉或可能性较小她一定/可能/也许2.对现在或一态动词一bedoing“我“e.gHemust/may/might/ycouldbeisteningtotheradionow他一定/可能/也许正在听收音机。Hecant(couldnD/may(might)
3、notbeathomeatthistime.这个时候他不可能/可能不在家。Mr,Bushisontimeforeverything,Howcan(could)hebelatefortheopeningceremony?布什先.这次开幕式他怎么可能迟到呢?3.对迢去情况的推测,用“候态动词一haye十过去e.g.Itmust/may/might/couldhaverainedlastnightThegroundiswet地湿了,昨晚肯定/可能/也许下语法专练一、用must,might,could,can.t填空完成句子。1.工heearringscouldbeJanes,Shewearsear-
4、ringssometimes。.ThefootballmightbeWeilHuasorTianHuis.Theybothplayfootball.He“must_beathome.Look1ThelightinhisroonisisO.ThejcanscantbeMichaels工heyaretooshortforhim.Thebasketball_might_belongtoMike.Hissu-perstarisYaoMing.二单项选择。(A)6.一Excuseme.sthistherightwaytotheSummerPalace?一Sorry,LamnotsureDe:A.migh
5、tDwill(InustDCanlrgJinehttetreom国0，elmyIIn勺urEhedOesn【wearglassSes。AcantBmustnotC.wontD.maynot洁一一髂壹(B)8.Ihavelostoneofmygloves.1where.A.mustdropBmusthavedroppedC.mustbedroppingD.musthavebeendroppedcondjWoftetveem一Tmsorrytohearthat,Youbeverysad.ACahtB.sh0uldCmustD.will(B)10.ItssurprisingthatMr.MaslittledaughterspeakEnglishsowelL.人.Imust卫canC.mustntD.cant(D)11.一IsJohncomingbytrain?日1pMgbbineiL口ripfIReIkesdrivinghiscar.AmustDcanC.needD.may
