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时间:2020-03-12
《英语虚拟时态详解.ppt》由会员上传分享,免费在线阅读,更多相关内容在工程资料-天天文库。
1、虚拟式虚拟式be----型虚拟式were----型虚拟式假设表示法综述用于表示命令、决定、建议、等词语后的that分句中用于由if,though,whatever,lest,solongas等引导的分句中用于某些公式化语句中用于某些状语分句中用于某些名词性分句中1.用动词的过去形式表示假设意义2.用情态动词过去式表示假设意义be----型虚拟式用于表示命令、决定、建议、等词语后的that分句中a.用在,demand,suggest,decide,prefer,vote等动词后that分句中。Co
2、nggresshasdecided/votedthatthepresentlawbemaintained.IpreferMarytotypetheletters.IpreferthatMarytypetheletters.b.用在advisable,appropriate,desirable,essential,obligatory,proper,imperative等形容词之后that分句中。Itisessentialtheallthefactsbeexaminedfirst.c.用在deci
3、sion,decree,demand,instruction,resolution等名词后的that分句中。TheboardhasgiveninstructionsthattheagentflytoBoston.在这一用法中be-型虚拟式能与should+不定式,to-不定式交替使用。Heorderthatthebooksbesentatonce=Heorderthatthebooksshouldbesentatonce=Heorderthatthebookstobesentatonce用于由i
4、f,though,whatever,lest,solongas等引导的分句中表示推测、让步、防备等含义。Ifhebefoundguilty,Johnshallhavetherightofappeal.上述用法现在只适用于正式书面语体,在非正式语体中通常用动词陈述式或者用should或may+不定式。如:Iftherumorbetrue,everythingispossible。Iftherumoristrue,everythingispossible。Whateverbehisdefense,w
5、ecannottoleratethisdisloyalty.Whateverhisdefensemaybe,wecannottoleratethisdisloyalty.用于某些公式化语句中Be-型虚拟式用于某些公式化语句中可表示祝愿、诅咒、禁止的意思。Longlivethepeople’sRepublicofChina!Farbeitfromme(我极不愿)tospoilthefun。Hewillremainhereifneedbe.练习中修改句子theambassadorwillstayth
6、ereifnecessary.theambassadorwillstaythereifneedbe..Itsufficestosaythattheopenpolicywillremainunchanged.Sufficeittosaythattheopenpolicywillremainunchanged.(只需说什么就够了)Homeishome,beiteversohomely.?were----型虚拟式1.用于某些状语分句中(if,ifonly,asif,asthough,though引导的
7、)IfIwereyou,Ishouldwaittillnextweek.2.用于某些名词性分句中常用于wish,wouldrather,suppose,imagine之后的that-分句中表示一种臆想的情况(通常是不可能发生的)Supposetheearthwereflat。在第一、三人称单数主语后可为was所取代Ifitwastorain,thegamewouldbeputoff.但是,在IfIwereyou这一分句中,通常倾向用were,而不用was。在某些倒装句中只用were。WereIt
8、odoit,Ishouldrelyonyou.Heismybestfriend,mysecondself,asitwere.(好像,宛如)现代英语中,许多改用虚拟式的地方常为陈述式所取代。ImagineyouarethesalesmanforFranco’sproduct.假设表示法综述1.用动词的过去形式表示假设意义a)Itistime(that)...Itistimewewenttobed.b)Iwouldrather/sooner(that)you/he/they...I’dratherh
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