语气英语的动词一般可带有三种不同的语气：陈述语气，祈使语气和虚拟语气。不同的语气用动词的不同形式（有的还借助句法形式）来表示。虚拟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)；一是表示说话人的愿望、要求、命令、建议等(在宾语从句、表语从句、同位语从句)。虚拟语气的概念一、虚拟语气在条件句中虚拟条件句主句与现在事实相反的假设与过去相反的假设与将来相反的假设If+主语+动词的过去式（动词be用were)主语+should,would,might,could＋动词原形If+主语+had+过去分词主语＋should,would,might,could＋havedone1、If+主语+动词过去式2、If+主语+wereto+动词原形3、If+主语+should+动词原形主语＋should,wouldmight,could＋动词原形eg:IfIhadtime,Iwouldattendthemeeting.Ifhehadhurried,hecouldhavecaughtthetrain.IfIweretogoabroad,IwouldgotoAmerica.如果我是你，我就会努力学习．如果我知道他的电话号码，我就给他打电话了．如果明天下雨的话，我们会取消比赛．IfIwereyou,Iwouldworkharderatmylessons.IfIhadknownhistelephonenumber,Iwouldhavecalledhim.Ifitshould\weretorain,wewouldcalloffthematch.Morepractice:注意在条件句中，可省略if，把were,had,should提到句首，变为倒装句式．IfIwereatschoolagain,Iwouldstudyharder.WereIatschoolagain,Iwouldstudyharder.Ifyouhadcomeearlier,youwouldhavemethim.Hadyoucomeearlier,youwouldhavemethim.Ifitshouldraintomorrow,wewouldnotgoclimbing.Shoulditraintomorrow,wewouldnotgoclimbing.二、虚拟语气在名词性从句中的运用１、wish后面的宾语从句中。一般用虚拟语气，表示一种不可能实现的愿望。其谓语动词形式为：表现在过去时表过去过去完成时表将来would,might,could＋动词原形Iwish(that)Iwereabird.Iwish(that)Ihadseenthefilmlastnight.Iwish(that)Iwould\couldgo.2.用于表示命令、建议、要求等一类词后面的宾语从句。insist,order,command,suggest,advise,propose,require,request,demand,desireetc.Wesuggestedthatthemeeting(should)beputoff.Theyinsistedthattheboy(should)gowiththem.注意：suggest当表示“暗示、表明”讲时，insist表示“坚持认为、坚持说”之意时，应用陈述语气。Thesmileonhisfacesuggestedthathewassatisfiedwithourwork.Themaninsistedthathehadneverstolenthemoney.他脸上的表情表明他对我们的工作很满意．那个人坚持说他没有偷钱．在suggestion/proposal/order/plan/advice/idea/request等名词后的表语和同位语从句中要用“should＋动词原形”should可以省略．3用于表语从句和同位语从句Myideaisthatwe(should)thinkitoverbeforeacceptingit.Mysuggestionthatwe(should)haveameetinghasbeenacceptedbyothers.Weallagreetothatsuggestionthatthemeeting(should)beputoff.Choosethebestanswer:1.Ididn'tknowhistelephonenumber.____it，I____then.A.HadIknown，wouldringhimupB.ShouldIknow，wouldhaverunghimupC.IfIknew；wouldringhimupD.HadIknown；wouldhaverunghimup2.Maryisilltoday.Ifshe_____，she____absentfromschool.A.werenotill，wouldn'tbeB.hadbeenill，wouldn'thavebeenC.hadbeenill，shouldhavebeenD.hadn'tbeenill，couldbeDA3.WereItodoit，I________itsomeotherway.A.willdoB.woulddoC.wouldhavedoneD.weretodo4.Theyoungmaninsistedthathe_____nothingwrongand_____free.A.did;setB.haddone;shouldbesetC.shoulddo;besetD.haddone;mustbeset5.Hegaveordersthattheexperiment____before5:30pm.A.befinishedB.willfinishC.mustbefinished6.Ididn'tseeyoursisteratthemeeting.Ifshe____，shewouldhavemetmybrother.A.hascomeB.didcomeC.cameD.hadcome7.Shewishesshe____tothetheatrelastnight.A.wentB.wouldgoC.hadgoneD.weregoingBDABCThankyou!
