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虚拟语气虚拟语气表示动作或状态不是客观存在的事实，而是说话人的主观愿望、假设、推测，有时甚至与事实相反。一、虚拟语气在名词性从句中的用法1、在“It’simportant/strange/natural/necessarythat…”这类句型里，that引导的主语从句

中的谓语动词常用“(should)+V-原”结构。eg:It’snecessarythathe(should)besentthereatonce.2、在动词wish后的宾语从句中对过去的虚拟：had+过去

分词wishthat对现在的虚拟：动词过去时(或动词过去进行时)对将来的虚拟：would/could+动词原形eg:IwishthatIhadsenttheoldmantohospitalintime.Iw

ishthatitwerespringalltheyearround.Shewishesthatshewerestilllivingwithhergrandmother.Iwishthatyouwould/couldcomesoon.3、在表示建议、命令、要求的动词如：suggest/adv

ise/propose/demand/order/command/insist/request/desire/require/intend/recommend/expect等后面的宾语从句中，谓语动词常用“(should)+V-

原”结构。eg:Isuggestthatwe(should)setoffatonce.但其中两个词suggest与insist要注意使用：√要使用虚拟语气√暗示建议坚持要求坚持认为eg:Jean’sfacesuggestedthatshewasill,andher

parentssuggestedthatshe(should)haveamedicalexamine.Theyoungmaninsistedthathehaddonenothingwrong,andheinsistedthathe(should)besetfree.4、

在advice/idea/order/demand/plan/proposal/suggestion/request等名词后面的表语从句和同位语从句中，谓语动词常用“(should)+V-原”结构。eg:Myideaisthatwe(should)doexercisesfirst.Wealla

greetohissuggestionthatwe(should)gotoBeijingforsightseeing.二、虚拟语气在定语从句中的用法It’s(high)time(that)…did/shoulddo…注意其中的should不能

省略。eg:It’shightimethatweleft/shouldleave.三、虚拟语气在状语从句中的用法1、虚拟语气在if条件句中的用法①对过去的虚拟从句：had+过去分词主句：would/should/could/might+have+过去分词eg:Ifyouh

adcomeafewminutesearlier,youcouldhavemether.另外，不定式的完成式可表达与过去事实相反的假设Tohavestudiedharder,youcouldhavepassedtheexam.②对现在的虚拟从句：动词过去式（be动词使用were

）主句：would/should/could/might+动词原形eg:IfIwereyou,Iwouldtellhimthetruth.③对将来的虚拟从句：动词过去式（be动词使用were）/should+动词原形/wereto+动词原形主句：would/should/could/

might+动词原形eg:Ifitweresunnytomorrow,Iwouldcometoseeyou.Ifitshould/weretoraintomorrow,themeetingwouldbeputoff.④if的省略如果if虚拟条件句中有we

re/had或should，可以省略if，把这几个词提前放在主语的前面，构成倒装。eg:WereIyou(IfIwereyou),Iwouldnotdoit.Shouldtherebeameetingtomorrow

(Ifthereshouldbeameetingtomorrow),Iwouldcome.Hadhebeenmorecareful(Ifhehadbeenmorecareful),suchmistakescouldhavebeenavoid

ed.⑤用介词短语代替if条件句eg:Withoutair(Iftherewerenoair),therewouldbenolivingthings.Butforyourhelp(Ifithadn’tbeenforyourhelp),Icouldn’thavedoneit.2、虚拟语气在a

sif/asthough/evenif/eventhough等引导的表语从句或状语从句中的用法对过去的虚拟：had+过去分词从句对现在的虚拟：动词过去式（be动词使用were）对将来的虚拟：would/should/could/might+动词原形eg:Helooksasifhewe

reanartist.HespeaksEnglishsofluentlyasifhehadstudiedEnglishinEngland.Evenifhewerehere,hecouldnotsolvetheproblem.四、虚拟语气用亍ifo

nly(要是……就好了)引导的感叹句中对过去的虚拟：had+过去分词ifonly对现在的虚拟：动词过去式（be动词使用were）对将来的虚拟：would/should/could/might+动词原形eg:Ifonlyshehadnotleft.IfonlyIwereabird.Ifonl

ythewindcouldstop.