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BillGates$2000000语气是动词的一种形式，表示说话人对发生的动作或所处的状态持有的态度或看法.英语中有三种语气:1.陈述语气2.祈使语气3.虚拟语气虚拟语气是表示主观愿望和假想,常用在条件句中,表示与事实相反或很难实现的主观愿望.虚拟条件句与现在事实相反如果我现在有两百万美元，我就能买这辆车。IfIhadtwomilliondollarsnow,Icouldbuythecar.如果我是BillGates，我就能买下这辆车。IfIwereBillGates,Iwould(could\should\might)buythecar.IfIhavetwomilliondollarsnow,Icanbuythecar.IfIamBillGates,Icanbuythecar.虚拟条件句与过去事实相反如果我昨天有两百万美元，我已买下这辆车了。IfIhadhadtowmilliondollars,Iwouldhaveboughtthecar.IfIhadtwomilliondollarsyesterday,Ihaveboughtthecar.虚拟条件句与将来事实相反如果我明天能得到两百万美元，我会买下这辆车。IfIgettwomilliondollarstomorrow,Ishallbuythecar.IfIgottwomilliondollarstomorrowIfIweretogettwomilliondollarstomorrowIfIshouldgettwomilliondollarstomorrowIwouldbuythecar.现在事实相反would/could/should/mightdo过去时were过去事实相反haddonewould/could/should/mighthavedone将来事实相反过去时shoulddoweretodowould/could/should/mightdo条件句主句1.IfIhadtakenyouradvice,Iwouldn’thavemadeamistake.2.Ifitshouldraintomorrow,theywouldn’tgoforanouting.3.IfIgotagunnow,Iwouldkillyou.4.Ifweweretohavethreedaysoff,wewouldenjoyaveryhappylife5.Ifhehadbeenthere,itwouldn’thavehappened.1.IfI______(be)you,Iwould/shouldstart.2.Ifhe____________(notcome),Imighthavenotbeenintrouble.3.Ifit_________(be)Sundaytomorrow,wewouldgotopark.werehadn’tcomeshouldbe错综时间条件句:Ifhehadlistenedtome,hewouldnotbeinsuchtroublenow.要是他那时听我的,现在就不会有如此的麻烦了.(条件句指过去,主句指现在)有时虚拟条件句与主句发生的时间不一致，就构成错综时间虚拟语气。1.IfI________________(notwatch)TVsolatelastnight,I____________(benot)sosleepynow.2.Ifyou__________(give)enoughwatertotheflowers,they________________(grow)wellnow.hadnotwatchedwouldnotbehadgivenwouldgrow有时虚拟条件并不通过条件从句表达出来，而是通过词、短语或上下文暗示，此时句子的时态要依具体情况而定。Withoutelectricity(＝Iftherewerenoelectricity)，lifewouldbequitedifferenttoday.如果没有电，今天的生活就会完全不同。Butfor(=ifithadnotbeenfor)yourhelp,Iwouldn’thavebeensuccessful.要是没有你的帮助，我就不会成功。Iwasbusythatday.OtherwiseIwouldhavegonetherewiththem.(IfIhadn’tbeenbusythatday，Iwouldhavegonetherewiththem.)我那天很忙，否则，我就和他们一起去那儿了。另类虚拟条件1.Butforthestorm,we2.Withoutyourhelp,Iwouldnothavesucceeded.shouldhavearrived(Succeed)earlier.(arrive)有时只有主句，不出现虚拟条件句，而是用without,butfor(要不是)等介词短语，或者用or,otherwise等副词或连词来表示虚拟条件，可称之为含蓄条件虚拟语气。虚拟条件句中,if省略时要用倒装结构.即:将从句中的had,should,were提前于句首：1._____youbeenherejustnow,youwouldhavemether.2._____itSundaytoday,Iwouldhaveagoodrest.3._______Iseehimtomorrow,Iwouldtellhimaboutit.WereHadShouldIfyouhadbeenherejustnow…IfitwereSundaytoday…IfIshouldseehimtomorrow…