if从句中的虚拟语气

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1、语气是谓语动词的一种形式，表明说话的目的和意图。英语中有四种语气：1）陈述语气（theindicativeMood）;Chinaisagreatcountry.2)疑问语气（theInterrogativeMood）;Areyoufromthesouth?3)祈使语气（theImperativeMood）;Comeinandtakeaseat.4)虚拟语气（theSubjunctiveMood）四种语气虚拟语气是一种特殊的动词形式，一是用来表示说话人所说的话不是一个事实，而是一种假设、猜测、怀疑等(在条件从句中或让步状语从句中)；一是表

2、示说话人的愿望、要求、命令、建议等(在宾语从句、主语从句、表语从句、同位语从句)。Ifhehaddrivenmorecarefully,hewouldnothavehadthecaraccidentyesterday.IwishIwereastallasyou.本节主要的学习内容：If状语从句中的虚拟语气1.时态问题2.错综时间的虚拟句3.省略if的条件从句4.含蓄虚拟条件句TheSubjunctiveMoodUsedinIf-Clause------byHongmei虚拟语气在在条件从句中在条件从句中(叫虚拟条件句)。表示与事实相反的

3、条件。分三种情况(以do为例)：表示与事实情况相反条件从句的谓语形式主句的谓语形式表示现在情况过去式(did)(be常用were)Would/could/might/should+动词原形(do)表示过去情况过去完成式(had+done)Would/could/might/should+havedone表示将来情况①过去式(did)/(were)②should+do③weretodoWould/could/might/should+doRight.Ourlifewouldn’tbesoeasyifwedidn’thaveacompute

4、r.Peoplehavebecomemoreinformedthaneverbeforewiththedevelopmentofcomputerscience.Accordingtothepicture,welearnthat:1.Ourlifewouldn’tbesoeasyifwedidn’thaveacomputer.(Thefactis:Acomputermakesourlifeeasy.)Peoplehavebecomemoreinformedthaneverbeforewiththedevelopmentofcomputer

5、science.Right.Ourlifewouldn’tbesoeasyifwedidn’thaveacomputer.Howniceitwouldbeifwecouldgetridofallkindsofviruses.Accordingtothepicture,welearnthat:1.Ourlifewouldn’tbesoeasyifwedidn’thaveacomputer.(Thefactis:Acomputermakesourlifeeasy.)2.Itwouldbemuchbetterifwecouldgetridof

6、allkindsofviruses.(Thefactis:Wecan’tpossiblygetridofallkindsofviruses.)Sorry,Ididn’tpassyesterday’stest.Ifyouhadbeenabitmorecareful,youwouldhavedonemuchbetterIftheboyhadbeenabitmorecarefulinyesterday’stest,hewouldhavedonemuchbetter.(Thefactis:Theboywasnotsocarefulinyeste

7、rday’stest,andhedidn’tdowell.)1.IfIhadHIV,IwouldknowbecauseIwouldfeelsick.2.IfIwereyou,IwouldgiveAIDSpatientahug.3.IfIhadtakenyouradvice,Iwouldn’thavemadeamistake.4.Ifhehadbeenthere,itwouldn’thavehappened.（与现在事实相反）（与过去事实相反）5.Ifitshouldraintomorrow,theywouldn’tgoforanouti

8、ng.6.Ithinkwecoulddoit,ifweplanneditproperlyandcouldborrowthetools.7.Ifweweretohavethreedaysoff,wewould