虚拟语气英语有两种语气——陈述语气和虚拟语气。陈述语气表示事实上发生的事情或客观存在的情况。虚拟语气表示假定、想象、愿望等非事实观念。Ⅰ.虚拟语气在条件句中主要有以下几种情况。(1).表达与现在的事实相反的假设或想象：条件从句主句If+主语+过去式，主语+should/would+动词原形If+主语+were，主语+would/should+动词原形(其中，should用于第一人称，would可用于各个人称。)IfIhadenoughmoney,Ishould/wouldbuyacamera.IfIwererich,Iwouldhelpthepoor.(2).表达与过去事实相反的假设或想象：条件从句主句If+主语+had+过去分词，主语+should/wouldhave+过去分词IfIhadhadenoughmoney,Iwouldhaveboughtacar.（=Ididn’thaveenoughmoney,soIdidn’tbuyit.）Ifithadnotrainedyesterday,weshouldhavegonefishing.(3)表达与将来事实相反的假设或想象，有三种形式：①条件从句主句If+主语+should+动词原形，主语+should/would+动词原形(表示可能性极小“万一”)Ifitshouldraintomorrow,Iwouldnotgo.注意：if从句的动词形式不分人称与数，一律用“should+动词原形”②条件从句主句If+主语+wereto+动词原形，主语+should/would+动词原形IfIweretogoabroad,IwouldgotoAmerica.倘若我要出国，我就到美国。③条件从句主句If+主语+动词过去式，主语+should/would+动词原形Ifhewenttotheparty,hewouldbedisappointed.(4)假设情况不用if从句来表示，而是用without,butfor,otherwise,or,but等表示一种含蓄条件。表示与现在或将来相反，用“would(should,could,might)+动词原形”；表示与过去相反用“would(should,could,might)+have+过去分词”Iknewmyuncledidhavenotime.Otherwisehewouldhavekeptmecompanytogohiking.例1：We______John'snameontheracelistyesterdaybutforhisrecentinjury.(2011·江西卷28)A.willputB.willhaveputC.wouldputD.wouldhaveput例2:I______throughthatbitterperiodwithoutyourgeneroushelp.(2011·陕西卷22)A.couldn'thavegoneB.didn'tgoC.wouldn'tgoD.hadn'tgone(5)条件从句if的省略：当从句中有were，过去分词had,或should时，if经常省略。此时，主语后面的主动词（were，had，should等）被移至句首。WereIabird,Iwouldflytoyou.=IfIwereabird,Iwouldflytoyou,Shoulditraintomorrow,Iwouldnotgothere.=Ifitshouldraintomorrow,Iwouldnotgothere.例:______inyourposition,Iwouldgo.A.IfIB.WereIC.IfwasID.IfIamⅡ用在从句中的虚拟语气⒈宾语从句中的应用（1）wish后的宾语从句：表示与现在事实相反的愿望，从句谓语用一般过去时或过去进行时；表示与过去相反的愿望，从句谓语用过去完成时；表示将来没有把握或不太可能实现的主观愿望，常用“would(could)+动词原形”。IwishIknewtheanswertothequestion..IwishedIhadn’tspentsomuchmoney.Iwishitwouldstopraining.Iwishyouwouldcomesoon.例：—Wherearethechildren?—Iwishthey______alwayslate.A.weren'tB.hadn'tbeenC.wouldn'tbeD.wouldn'thavebeen(2)在具有愿望、请求、建议、命令等主观意愿的动词(desire,demand,advice,insist,require,suggest,propose,order,recommend,decide…)后的宾语从句中需用虚拟语气。谓语动词用(should)+动词原形。值得注意的是，如果宾语从句的动词是否定的，否定词not的位置应在动词之前，而不是动词之后。Idemandthathe(should)answermeimmediately.Theheadnurseinsistedthatthepatientnotbemove.【注意】(1)suggest意为“表明，暗示”时，宾语从句不用虚拟语气.Hispalefacesuggestedthathewasinpoorhealth.(2)insist意为“坚持认为，坚持说”时，宾语从句不用虚拟语气。Heinsistedthathedidnotkilltheboy.2.主语从句中的应用Itis+形容词/名词/过去分词+that引导的主语从句，主语从句中谓语动词常用“should+动词原形”。常用形容词有：necessary,important,essential,imperative,urgent,preferable,vital,advisable等常用名词有：duty,pity,regret,nowonder,shame等。常用过去分词有：demanded,suggested,required,requested,ordered,decided等Itissuggestedthatpupils(sh...