情态动词havedone

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1、高考“情态动词＋havedone”考点解析   “情态动词＋havedone”结构是高考重要考点，也是较难掌握的语法项目之一，为了帮助同学们更好地掌握使用这一考点，下面结合近年高考试题谈谈其主要用法。考点之一：在虚拟条件句中，如果表示与过去事实相反的情况，从句中用过去完成时，而主句中则用“情态动词＋现在完成时”，即：would/could/should/mighthavedone。例如：Iftheyhadfinishedtheworkontime,theywouldhavebeenpraisedbythemanager.Ifyouhad

2、workedhard,youcouldhavepassedtheexamination.高考题分析：1.Ifit___forthesnow,we___themountainyesterday.(MET91)A.werenot;couldhaveclimbedB.werenot;couldC.hadnotbeen;couldhaveclimbedD.hadnotbeen;couldclimb2.---IstayedatahotelwhileinNewYork.---Oh,didyou?You___withBarbara.(NMET98)A

3、.couldhavestayB.couldstayC.wouldstayD.musthavestay3.YesterdayJanewalkedawayfromdiscussion,otherwise,she___somethingshewouldregretlater.(96上海)A.hadsaidB.saidC.mightsayD.mighthavesaid答案简析：1.根据信息词yesterday可以判断该句是表示与过去事实相反的虚拟条件句，从句中应该用“情态动词＋现在完成时”，故答案选C。2.本句是一个含蓄虚拟条件句，意思是：If

4、youhadn’tstayatahotelwhileinNewYork,youcouldhavestayedwithBarbara.表达了与过去事实相反的情况，答案选A。3.本句考查的也是含蓄虚拟语气，意思是：如果她参加了讨论，她可能会说出一些后来令她后悔的话。表达了与过去事实相反的情况，故答案选D。考点之二：musthavedone表示对过去已经发生过的情况的肯定推测判断，语气较强，意思是“一定……、肯定……”。其否定形式分别用can’t/couldn’t和can/could。例如：Itmusthaverainedlastnight,

5、forthegroundiswetthismorning.昨天晚上一定是下雨了，因为今晨地面是潮湿的。Shedidn’tattendthelessonyesterday.Shemusthavebeenill.她昨天没有上课，她一定是生病了。巩固练习：He____havecompletedhiswork,otherwise,hewouldn’tbeenjoyinghimselfbytheseaside.(０５北京　２６题)A.shouldB.mustC.wouldn’tD.can’tThiscakeisverysweet.You___al

6、otofsugarinit.(05　辽宁　26题)Ａ.ShouldputB.couldhaveputC.mightputD.musthaveput---Tomisneverlateforwork.Whyisheabsenttoday?---Something___tohim.(05江西　22题A.musthappenB.shouldhavehappenedC.couldhavehappenedD.musthavehappenedIwasonthehighwaywhenthiscarwentpastfollowedbyapolicecar

7、.They___atleast150kilometersanhour.(05重庆　33题)A.shouldhavebeendoingB.musthavebeendoingC.couldhavedoneD.wouldhavedoneI____havebeenmorethansixyearsoldwhentheaccidenthappened.(05天津　14题)A.shouldn’tB.couldn’tC.mustn’tD.needn’t---DoyouknowwhereDavidis?Icouldn’tfindhimanywhere.(

8、05湖北32题)A.shouldn’tB.mustn’tC.can’tD.wouldn’t 1.Ididn’thearthephone.I____asleep.(MET89)A.mustbeB.mustha