虚拟语气
语气，时态和语态都是动词的语法范畴。语气分为三种：陈述语气，祈使语气和虚拟语气。陈述语气用来陈述事实和对事实提出疑问。祈使语气用来表示命令和请求。虚拟语气用来表示说话人的一种主观愿望和假设的情况，而并非事实或难以成为事实，用于简单句，条件句以及其他的一些从句中。
Ⅰ. 虚拟语气在条件句中的运用
英语中的条件句一般有两种，真实条件句和非真实条件句。虚拟语气用在非真实条件句。非真实条件句包括虚拟条件句，推测条件句和错综时间条件句等。
1．虚拟条件句
虚拟条件句可以分为两类，一类是叙述与现实事实相反的情况，一类是叙述与过去事实相反的情况，其构成形式是：
条件从句结果主句
与现在事实相反If I(we, you, he, she,
it, they)+动词的过去
式（be动词的过去式
一律用were）
I(we, you, he, she, it,
they)+would+动词原
形
与过去事实相反 If I(we, you, he, she,
it, they) had+ 过去分
词
I(we, you, he, she, it,
they)+ would+
have+过去分词
注意；would 省略时也可以按句意换用should, could或might.
The flood might have caused great damages to the people if we hadn’t built so many reservoirs.
The conference wouldn’t have been so successful if we hadn’t made adequate preparations.
I am sorry I am very busy just now. If I had time, I would certainly go to the movies with you
2．推测条件句
对未来的事进行推测，在讲话人的心目中，虽然不认为推测条件的实现违背事实或绝对不可能，但却认为可能性极小。这种怀疑和推测要用虚拟语气表示，其构成形式如下：
条件从句结果主句
If I(we, you, he, she, it, they)+动词过去式（be 动词的过去式一律用
were）
If I(we, you, he, she, it, they)+should+动词原形If I(we, you, he, she, it, they)+were to +动词原形I(we, you, he, she, it, they)+would+动词原形
If I were to see him, I would speak to him about it.
I would not believe it, unless I should see it
3．错综时间条件句
在错综时间条件句中，虚拟显见从句和主句的动作发生的时间不一致，因此，主句和从句的谓语动词要根据各自所指的不同时间选用适当的虚拟语气形式。例如：
Had I taken my umbrella with me when I came out this morning, I should not be wet now.
如果我早上出门是带了伞，现在我就不会淋湿了
If you had spoken to him last time you saw him, you would know what to do now.
如果你赏赐看到他是跟他说一下，现在就知道该怎么做了。
4．虚拟条件句的简化
有些虚拟条件句可以不用从句表现出来，而是用介词，介词短语，动词不定式短语或利用上下文等形式表现出来，比如：with, without, but for , suppose, supposing, or, otherwise, but. Though, even, in the event that. 例如：
But for your help we couldn’t have succeeded.
要不是有你的帮助，我们是不会成功的。
They wouldn’t have reached the agreement so easily without that common ground.
没有共同的立场，他们是不会那么容易达成协议的。
She wasn’t feeling very well. Otherwise she wouldn’t have left the meeting so early.
她感到不舒服，不然她是不会那么早走的
Ⅱ。虚拟语气在某些从句中的运用
1．动词wish后的宾语从句用虚拟语气
与现实事实相反，用were或动词的一般过去式，与过去事实相
反，用had+过去分词或would/could + have+过去分词；表示将来没有把握或不太可能的愿望，would/could(should, might)+动词原形。例如：
I wish she were here.
I wish she would go with me tomorrow.
I wish she had taken my advice.
2．would rather(sooner), had rather, would as soon和just as soon后的句子用虚拟语气。
I’d rather you paid the money yourself.
I would sooner she painted the wall green next time.
3．if only后用虚拟语气。
If only she had known where to find you. 要是她知道去那里找你就好了。
If only I could speak several languages !我要是能将几门外语就好了。
4．虚拟语气用在suggest, order, demand, propose, command, request, desire, insist, require, decide, promise, arrange, ask, move, consent, determine, recommend, advise, intend, beg, resolve, argue等动词后的宾语从句中，这时，谓语动词要用动词原形或should+动词原形
She insisted that the seats (should)be booked in advance.
He advised that the doctor (should) be sent for.
5．虚拟语气用在advice, demand, order，decision, proposal, necessity, requirement, suggestion,等名词后的从句中, 这是谓语动词用原形或should+动词原形
The demand is that the job (should) be finished today.
6．形容词important, necessary, probable, possible, preferable. Advisable等，可以构成‘it is +形容词+that’, 其后的句子要用虚拟语气。这时，谓语动词用原形或should+动词原形。
It is necessary that something (should) be done to deal with it.
7．It is (high, about) time……句型要求用虚拟语气, 这时，位于动词用过去式或should+动词原形（should不能省略）例如；It is high time that we were off.
高中英语语法虚拟语气 教学设计 集团档案编码：[YTTR-YTPT28-YTNTL98-UYTYNN08]
高中英语语法虚拟语气教学：The subjunctive mood 厦门第十中学吕瑞珠 一、概述 本节课是高中英语语法教学课，授课内容为虚拟语气，授课对象是高三年学生。从呈现、加深记忆、巩固到实践并将语言项目运用于写作中并做适当的点评，大概需要两课时。但我这里着重阐述的是第一课时的教学内容、教学策略等。 通过本节语法教学课的学习，学生重新整合自己的有关虚拟语气的知识，复习已知的虚拟语气的表达形式如：I wish I could fly freely in the sky like a bird; It is high that you got up.等等，并学习新的表达形式如：The English teacher suggested that we should read the English newspaper every day; I would have passed the English exam if I had worker harder in the past 20 days.最为重要的是，学生在学习完虚拟语气的表达形式后，要在写作中运用。 虚拟语气在高中英语语法的难点之一，多数学生感到费解，因此也更需要老师的指导与相应的实践与运用，并且较好地掌握虚拟语气的表达形式，有助于扫除学生阅读过程中对个别句子的理解。 二、教学目标分析 1．知识与技能 1）复习学生已掌握的虚拟语气表达的句型： I wish I were… / I could … It is high time that you did your homework.. If I were you, I would… 2) 学习虚拟语气新的表达方式，尤其是if引导的虚拟条件状语从句，掌握与现在事实、与过去事实、与将来事实相反的三种虚拟语气的表达，特别是主句与从句时态的呈现；还有引导出的宾语从句需要运用虚拟语气的动词，如suggest, insist, propose, demand and so on. 3）培养学生运用所学知识表达自己的思想的能力。 2．过程与方法 1）引导学生在欣赏英文歌曲An Angel的情景教学过程中，开启对虚拟语气表达已有的知识记忆。
虚拟语气 一．语气的分类： 二．虚拟语气的用法： （一）虚拟语气在if条件句中的用法： ---If I were you, I would give it up. (与现在事实相反) ---If I had taken his advice, I would not have made such a mistake. (与过去事实相反) ---If she came/should come/were to come, I could ask her for help. (与将来事实相反) 2．特殊用法： ①错综时间虚拟条件句：条件从句与主句所指时间不一致，主从句的谓语动词要根据假设的时间来定。 ---If you had followed the doctor’s advice, you would be much better now. ②if条件句虚拟倒装：可以把if从句中的should, were, had置于句首，省略if构成倒装。 ---Were I you, I would give it up. ---Had I taken his advice, I would not have made such a mistake. ---Should she come, I could ask her for help. ③含蓄虚拟条件句：有时假设的情况并不以if引导的条件从句表示出来，而是通过一个介词短语或其他方式表示。常用的词或短语有：without, but for, otherwise, or, but等。 ---Without/But for your help, I could not have succeeded. ---I should have returned the book last week, but I was too busy. （but后为真实情况） ---He was ill, otherwise/or he would have helped us. （otherwise/or前为真实情况） ④特殊的if句虚拟：If it were (had been) not for…“要不是…” ---If it were not for peace, we could not be living a happy life. ---If it had not been for your help, I would have failed. （二）虚拟语气在名词性从句中的用法： 1．一些表示坚持，命令，建议，要求的词用于名词性从句中时从句的谓语动词用虚拟（一坚持，二命令，三建议，四要求） ---Our teacher suggested that we (should) study hard. (宾语从句) ---That we (should) study hard was our teacher’s suggestion. (主语从句) ---It was suggested that we (should) study hard. (主语从句) ---Our teacher’s suggestion was that we (should) study hard. (表语从句) ---Our teacher gave us a suggestion that we (should) study hard. (同位语从句) ★suggest表示“暗示”，insist表示“坚持说”时不用虚拟。 ---His pale face suggested that he was ill. ---The old man insisted that I had stolen his money.
虚拟语气在非真实条件句中 ①错综时间条件句: 当条件状语从句表示的行为和主句表示的行为所发生的时间不一致时，被称为错综时间条件句，动词的形式要根据它表示的时间作出相应的调整。如： If you had followed my advice just now, you would be better now. If you had studied hard before, you would be a college student now. ②if省略句 在条件句中可以省略if, 把were, had, should提到句首，变成倒装句式。否定句时not留在原来位置不变。如： If I were at school again, I would study harder. →Were I at school again, I would study harder. 如果我还有上学的机会，我会更加努力学习。 If you had come earlier, you would catch the bus. →Had you come earlier, you would catch the bus. 如果你来得早点，你就能赶上公共汽车。 If it should rain tomorrow, we would not go climbing. →Should it rain tomorrow, we would not go climbing. 如果明天下雨的话，我们就不能登山去了。 ③用介词代替条件状语从句 常用的介词有with, without, but for。如： What would you do with a million dollars? (=if you had a million dollars)
虚拟语气: 表示说的话不是事实，不可能发生或者说可能性很小的情况，表达一种愿望、建议、假设。 if were/did, would do if had done, would have done if were to do/should do, would do 举例： If I were you, I would do nothing about it. If you had taken your teacher’s advice, you wouldn’t have made such a mistake. If it were to/ should rain tomorrow(表示降水率很低)，they wouldn’t go shopping. 附注： 虚拟语气，条件状从倒装 状语从句中，去掉if,提前were/ had/ should 如：If I were you, I would give up. →Were I you, I would give up If you had taken the advice, you would have…. →Had you taken the advice, you would have… If the world shou ld come to an end,…… →Should the world come to an end…… 另外，without, but for, otherwise构成的条件状语从句中，也有含蓄的虚拟语气But for the popularization of electricity, we would lead a whole different life today. (popularization 普及，publicity 宣传) Without your help, I would have failed. We’ll go earlier, otherwise we wouldn’t get a seat.（表示可能性小）
高中英语语法讲解--虚拟语气 1. 语气的定义和种类 （1）语气的定义 语气是动词的一种形式，它表示说话人对某一行为或事情的看法和态度。 （2）语气的种类 A. 陈述语气 表示动作或状态是现实的、确定的或符合事实的，用于陈述句、疑问句和某些感叹句。 We are not ready. Did it rain all day yesterday? What a fine day today！ B. 祈使语气 表使说话人的建议、请求、邀请、命令等。 Be careful. Don’t forget to clo se the window. Open the door, please. C. 虚拟语气 表使动作或状态不是客观存在的事实，而是说话人的主观愿望、假设或推测等。 2. 虚拟语气 一. 虚拟语气在条件句中的应用 学习虚拟语气在条件句中的用法之前我们必须清楚条件句的种类：条件句有真实条件句与非真实条件句(或称虚拟条件句)两种。真实条件句所表的假设是可能发生或实现的，句中的条件从句与结果主句都用陈述语气。如： If it doesn’t rain tomorrow, I will go for a picnic. 假若明天不下雨，我就去野餐。 Oil floats if you pour it on water. 你如把油倒在水里，油就浮起来。 虚拟条件句所表的假设则是不可能或不大可能发生或实现的，句中的条件从句与结果主句皆须用虚拟语气。 1. 与现在事实相反的虚拟条件句，条件从句的谓语用动词的过去式(be的过去式用were), 主句的谓语用should （would, might，could）+动词原形。 如： If it were not raining, we should go for a picnic.如果现在不下雨的话，我们就出去野餐了。 （事实是：天在下雨，我们不能出去野餐。表示愿望。） If he came here, he might be able to help you. 如果他来这，他就能够帮助你了。 （事实是：他没来这，他不可能帮助你。表示对他的良好印象。） 2. 与过去事实相反的虚拟条件句，条件从句的谓语用had+过去分词，主句的谓语用should （would, might，could）+ have ＋过去分词。 如：She would have gone to the party if she had been invited.
Unit13虚拟语气专题讲解 【知识要点】 语气（mood）是一种动词形式，用以表示说话者的意图或态度。 英语有三种语气： ＊直陈语气（indicative mood）---- 事实 France lies to the east of England. ＊祈使语气（imperative mood）---- 请求、命令 Make yourself at home. ＊虚拟语气（subjunctive mood） If there were no air and water , we should not be able to live on the earth. 虚拟语气表示说话人的一种主观愿望或假想，所说的是一个条件而不一定是事实，或与事实相反。 一. 虚拟语气在if条件状语从句中的用法 假设类型条件从句谓语 动词形式 主语谓语 动词形式 与现在事实相反动词的过去式(be用were而不用was) should/ would /could/ might+动词原形 与过去事实相反had + 过去分词 should/ would/could /might + have+过去分词 与将来事实相反1.should+动词原形 2.动词过去式 3.were to+动词原形 should/ would/ could/ might +动词原形 1. 在错综条件句子中，虚拟条件从句和主句动作发生的时间不一致，因此，主句和从句的谓语动词应根据所指的时间选用适当的虚拟语气形式。 1）If I were you，I wouldn't have missed the film last night． 2）If he had followed the doctor's advice，he would recover already．（从句与过去事实相反，主句与现在事实相反。） 2、在if虚拟条件句中，有时可把连词省去，采用倒装语序把谓语动词were或助动词did，had，should 移到句 首构成非真实条件从句的另一种句型，其意思不变。 1）Had we time to spare，we would be glad to go to the park． 2）Were it not for the discovery of electricity，the modern world would experience great inconvenience． 3、有时假设的情况不用if引导虚拟条件从句来表述，而用介词（如without， but for等）引出的短语、分词 （如supposing等）引出的短语、并列连词（如or，otherwise，but，though等）、由动词suppose引出的祈使句或通过上下文的意思来表达。此时句中谓语动词仍采用虚拟语气的相应形式。 1）But for your advice，I would not be able to do this work． 2）Victor obviously doesn't know what's happened，otherwise he wouldn't have made such a stupid remark．。
新概念英语第二册语法总结：虚拟语气 虚拟语气分三种情况来掌握： 1、虚拟条件句。 2、名词性虚拟语气。 3、虚拟语气的其他用语。 一、虚拟条件句： 条件状语从句是非真实情况，在这种情况下要用虚拟语气。 1、条件从句与现在事实不一致，其句型为： If 主语＋过去时，主语＋should(could, would, 或might)＋动词原形，如： If I were you, I would study hard. If it rained, I would not be here now. 2、条件从句与过去事实不一致，句型为： If 主语＋had＋过去分词，主语＋should(could, would, 或might)＋have＋过去分词，如：If the doctor had come last night, the boy would have saved. If I had not studied hard, I would have failed in the exam last term. 3、条件从句与将来事实不一致，句型为： If 主语+should(were to, 过去时)＋do，主语＋should(could...)＋原形do，如： If it should rain tomorrow, we would stay at home. If I were to go to the moon one day, I could see it with my own eyes. If you missed the film to night, you would feel sorry. 注意问题： 1、If条件句中绝对不可出现"would"。 2、根据句中的时间状语，有时可能出现“混合虚拟”的情况，即主句可能是现在的情况，条件句也许是发生在过去的情况，但都是遵守上述句型。 3、在条件句中如果出现were, had, should可省去if，将主语与这些词倒装，例如： Had the doctor come last night, the boy would have saved. Were I to go to the moon one day, I would see it with my own eyes. Should it rain tomorrow, we would stay at home.
虚拟语气的用法总结 语气：语气是动词的一中形式，它表示说话人对某一行为或事情的看法和态度。 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，假设或推测等。如If I were you, I should study English. 一．虚拟语气在条件从句的用法 条件句有两类，一类是真实条件句；一类是非真实条件句，也就是虚拟条件句。 如果假设的情况是有可能发生的，就是真实条件句，谓语要用陈述语气。如If it doesn’t rain tomorrow, we will go to the park. 如果假设的情况是过去或现在都不存在的，或将来不大可能发生的，则是虚拟条件句。如If he had seen you yesterday, he would have asked you about it. 在含有虚拟条件句的复合句中，主句 If her mother had taken the doctor’s advice, she would/might have got well earlier. If it were to rain tomorrow, the match would be canceled. 有时候省略if，采用局部倒装语序。把had /should/were 等动词（不包括行为动词）移到从句的句首。例如： Were it to rain tomorrow, our picnic would be canceled. Had it not been for the storm, we would have arrived in time. Should the earth stop running, what would happen? 二. 错综时间条件句 有时条件从句的动作和主句动作发生的时间不一致，这时需要根据意思采用表示不同时间的动词形式来进行调整。 If she had taken the doctor’s advice, she might still be alive. If I were you, I would have accepted their terms. 三．含蓄条件句
考研英语语法虚拟语气解析（一） 虚拟语气是谓语动词的一种形式，用来表示假设，或用来表示命令、建议以及说话人的主 观愿望，有时也可以使语气缓和、委婉。虚拟语气作为一重点语法，在各类考试中占有相当 大的分值，所以理解该语法，不管对于考试，还是在日常应用中都有相当大的作用，本节将 就考试重点作详细讲解。 一、虚拟语气的用法 常用于条件句中，表示与现在、将来、过去相反的假设，表示与现在、将来、过去相反假设时，主句与从句谓语动词的变化形式，现以动词do为例说明。 主句从句现在would/should/could/might + do be 宀were/do 宀did 将来 would/should/could/might + do were to + do/should + do （只能用should）过去 would/should/could/have done had done注：有些语法书中在"与将来相反假设”的条件从句中也有do i did，这样就和“与现在相反假设”的主句、从句完全相似，其主要区别在于各自的时间状语上，另外如果在“与将来相反假设”的条件从句中出现should+ do，那么主句 中就避免使用should+do，可以用would/could/might+do。 例句：If you were to exam ine the birth certificates of every soccer player in 2006 s World Cup tour name nt, you would most likely find a no teworthy quirk. （选自2007 年Text 1） 分析：该句是复合句。 译文：假如你去调查2006年世界杯上每位足球运动员的出生证明，你很可能会发现一 个值得注意的现象。 例句：If that happe ned, passi on ate con sumers would try to persuade others to boycott products, putting the reputation of the target company at risk.（选自2011 年Text 3）分析：该句是复合句，表示与现在相反的假设。其中，分词短语putting the reputation of the target company at risk在句中作状语，表示结果。 译文：这种情况一旦发生，充满激情的消费者会尽力说服他人抵制产品，从而使目标企业的声誉处于危 险境地。 例句：Everything here would have been destroyed utterly , if his wife hadn t called the fire brigade. 分析：该句是复合句。 译文：要不是他的妻子给消防队打电话，这里的一切就被彻底地破坏了。 二、混合式虚拟语气 有时条件从句和主句时态不一致，可以根据主句、从句动作发生的时间分别运用相应的 虚拟语气。 例句：He would be studying at the university now if he had passed the entrance exam in ati on.
虚拟语气 1. I wish (that可省略,下同)I knew the answer to the question.我希望知道这个答案。(事实上是不知道) 2. He wishes he hadn't lost the chance. 他真希望没有失去机会。(其实已失去) 3. You wished she would arrive the next day.(would + arrive) 你希望她第二天会到。(事实上她还没到) Subjunctive Mood作为专门表达假设意义和其他非事实意义的动词形式，仅是古英语遗留下来的残余。它仅有两个形式，即be型虚拟式和were型虚拟式。 Be型虚拟]----- be型虚拟式是以动词原形表示的，不管主语是什么人称，动词一律用原形，如动词为被动态，则助动词be也用原形。其主要用法如下： 1)用于表命令、决定、建议、坚持等词语之后的that分句中 这一用法又分三种情况： a)用在 decide,decree,demand,insist,move,order,prefer,propose,recommend,request,require, suggest,vote等动词之后的that分句中.（宾语从句） 在expect, believe, think, suspect等动词的否定或疑问形式后的宾语从句中，我们经常用“should＋动词原形(或完成形式)”，表示惊奇，怀疑，不满等。 He ordered that all the books be sent at once. He ordered that all the books be sent at once. we propose that somebody neutral take the chair. She insisted that she go to the south for her holiday. b)用在 advisable,appropriate,desirable,essential,fitting,imperative,important,impossible,nece ssary,obligatory,proper等形容词之后的that分句中。（主语从句） It is essential that all the facts be examined first. It was appropriate that thisi tax be abolished. I thousht it advisable that an armed guard stand in readiness. c)用在 decision,decree,demand,instruction,order,requirement,resolution等名词之后的that分句中。 The board has given instructions that the agent fly to Boston. We were faced with the demand that this tax be abolished. Their decision was that the school remain closed. 在这一用法中be型虚拟式能与“should+不定式”交替使用，也能与to-不定式交替使用。 He ordered that the books be sent at once . = He ordered that the books should be sent at onc. = He ordered that the books to be sent at once. 2）用于由if,though等引导的分句中.
虚拟语气(the subjunctive mood,又称假设语气,是谓语动词的一种形式,表示说话人叙述的内容与事实相反,在现实中并不存在,或实现的可能性很小。 一、动词的语气 语气用来区别讲话人对某一行为或事情的看法和态度。英语中的语气(mood有三种,分别是陈述语气、祈使语气和虚拟语气。 1.陈述语气 陈述语气一般用来叙述事实或就事实提出询问,主要用于陈述句、疑问句和某些感叹句。 Where there is a will, there's a way. 有志者事竟成。 Can you help me carry the box upstairs 你能帮我把箱子搬到楼上吗? How I missed the life in the countryside! 我多么想念乡村的生活啊! 2.祈使语气 祈使语气表示说话人向对方提出请求或下达命令。 Come this way,please! 请这边走。 Don't make any noise, will you 别吵,行吗? Do be careful when crossing the street. 过马路时一定要小心。 3.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、假设或推测等。 If I were a bird, I could fly in the air. 如果我是一只小鸟,我就能在空中飞行。 I wish it were spring all the year round. 但愿四季如春。 May good luck be yours! 祝你好运! 二、条件句中的虚拟语气 英语中条件从句有两类,一类是真实条件句,另一类是非真实条件句。如果假设的情况可能发生,是真实条件句;如果假设的情况是不存在的或不大可能发生的,则是虚拟条件句。 A.真实条件句 真实条件句表示的假设是可能发生或实现的,主句和从句的谓语动词都要用陈述语气。 If he doesn't come at 8, we won't wait for him. 如果他八点不来,我们就不等他了。 If a flood happened in the past, there was usually a great loss of life and property.过去发生洪水的话,常有很大的生命和财产损失。 We shall go there unless it rains tomorrow. 如果明天不下雨,我们将去那里。 I'll let you use my bike on condition that you keep it clean. 如果你能保持车子干净,我就让你用我的自行车。 B.非真实条件句 在含有非真实条件句的复合句中,主句和从句的谓语动词都要用虚拟语气,其构成有三种形式: 与现在事实相反if条件句的谓语:were did
虚拟语气在非真实条件句中
①错综时间条件句: 当条件状语从句表示的行为和主句表示的行为所发生的时间不一致时，被称为错综时间条件句，动词的形式要根据它表示的时间作出相应的调整。如： If you had followed my advice just now, you would be better now. If you had studied hard before, you would be a college student now. ②if省略句 在条件句中可以省略if, 把were, had, should提到句首，变成倒装句式。如：If I were at school again, I would study harder. →Were I at school again, I would study harder. 如果我还有上学的机会，我会更加努力学习。 If you had come earlier, you would catch the bus. →Had you come earlier, you would catch the bus. 如果你来得早点，你就能赶上公共汽车。 If it should rain tomorrow, we would not go climbing. →Should it rain tomorrow, we would not go climbing. 如果明天下雨的话，我们就不能登山去了。 ③用介词代替条件状语从句 常用的介词有with, without, but for。如： What would you do with a million dollars? (=if you had a million dollars) 如果你有100万元，你会做什么？ We couldn?t have finished the work ahead of time without your help. (=if we
虚拟语气用法 英语中的语气分为陈述语气、祈使语气、虚拟语气、疑问语气和感叹语气五类。 1、表示动作或状态是客观存在的、确定的或符合事实的，用于陈述句、疑问句和某些感叹句中。 China is an Asian country. (肯定句) How interesting my stay in China has been! (感叹句) 2、祈使句表示说话人对对方的请求、警告，建议或命令。如: Please come over here. 请到这边来。 Watch your steps! 当心!(走路) 3、虚拟语气表示说话者做出的假设而非事实，或难以实现的情况，甚至表达彻底相反的概念。此外，如需表达主观愿望或某种强烈的感情时，也可用虚拟语气。虚拟语气是由句中的谓语动词的特殊形式表示出来的。如: If I were a bird，I would be able to fly in the air. 如果我是一只小鸟，我就能在空中飞行。 I wish I could pass the examination. 我希望我能通过考试。
If there were a heavy snow next Sunday, we would not go skating. 如果下周日下大雪，我们就不能去滑冰了。 If she were to be here next Monday, I would tell her about the matter. 如果她下周一来这儿的话，我就会告诉她这件事的始末。 4、有时，虚拟条件句中，结果主句和条件从句的谓语动作若不是同时发生时，虚拟语气的形式应作相应的调整。这种条件句叫错综条件句。 ①从句的动作与过去事实相反，而主句的动作与现在或现在正在发生的事实不符。 If I had worked hard at school, I would be an engineer, too.如果我在学校学习刻苦的话，我现在也会成为一个工程师了 If they had informed us, we would not come here now. 如果他们通知过我们的话，我们现在就不会来这里了。 ②从句的动作与现在事实相反，而主句的动作与过去事实不符。 If he were free today, we would have sent him to Beijing. 如果他今天有空的话，我们会已经派他去北京了。 If he knew her, he would have greeted her. 要是他认识她的话，他肯定会去问候她了。 5、当虚拟条件句的谓语动词含有were, should, had时，if可以省略，这时条件从句要用倒装语序，即把were, should, had等词置于句首，这种多用于书面语。 Should he agree to go there, we would send him there.要是他答应去的话，我们就派他去。 Were she here, she would agree with us.如果她在这儿的话，她会同意我们的。 Had he learnt about computers, we would have hired him to work here. 如果他懂一些电脑知识的话，我们已经聘用他来这里工作了。 【注意】 若条件从句为否定句，否定词not应置于主语之后，而不能与were，should，had 等缩略成Weren't，Shouldn't，Hadn't而置于句首。 Had it not been for the bad weather we would have arrived on time. 若不是天气坏，我们就准时到达了。 ②有时省略if后提前的had不是助动词: Had I time，I would come. 假若我有时间，我会来的。(=If I had time…) 6、非真实条件句中的条件从句有时不表达出来，暗含在副词、介词短语、上下文或其他方式表示出来，这种句子叫做含蓄条件句。 ①将条件会暗含在介词短语中，如without…, but for…,otherwise（要不是因为）等 But for his help, we would be working now. (要不是他的帮助，我们还会在工作呢。
虚拟语气语法汇总
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虚拟语气 在英语文法中有三种语气，即直述式语气(Indicative Mood)、祈使语气(Imperative Mood)和虚拟语气(Subjective Mood)，其中前两种我们早已熟悉了，这里则不多谈了，如：How beautiful she is! 则是直述式语气，而Hurry up! Don't hurry up 则是祈使语气。我们主要来看看虚拟语气的主要用法。虚拟语气主要是用来表达一种无法实现的愿望，一种与事实相反的情况，或者将不可能实现的，或可能性很小的事实，假想为事实予以表述。这样的动词结构称为虚拟语气。它主要有三种形式，即与现在事实相反的假设，与过去事实相反的假设，与将来事实相反的假设。它们具体结构如表８－７。 虚拟语气的构成 种类条件句结构主句结构 与现在事实相反动词用过去式 be 动词用were Should/could＋动词原形 would/might＋动词原形 与过去事实相反的用had＋过去分词 Should/could＋have＋过去分词 would/might＋have＋过去分词 与将来事实相反动词用过去式 were to 加动词原形 should 加动词原形 should＋动词原形 would＋动词原形虚拟语气其他习惯用法简表 种 类 功用句型例句 虚拟语气表示主观 愿望 主句谓语宾语从句谓语动词I wish we could go to the seaside today. wish 现在过去式 过去 had+过 去分词 I wish I had gone to the basketball match. 将来 should+ 动词原 形 would+ 动词原 形 could+动 词原形 might+动 词原形 I wished I could fly to the moon. I wish you would stay here a little longer. would rather 现在过去式 I would rather you came to my party tomorrow. 表示虚拟状语从句从句动She looked after the orphan as if he
语言结构之虚拟语气（学生版） 用所给动词的正确形式填空，注意使用合适的情态动词助动词 1. If I _____ him yesterday I _____ him about it. (see, ask) 2. What do you think would happen if there _____ no light during the days? (be) 3. But for your help, I couldn’t _____ the place. (find) 4. If her lawyer _____ here last Sunday, he _____ her from going. (be, prevent) 5. If it had not been for the liberation, no changes _____ place in my hometown. (take) 6. If Miss Green _____ late tomorrow, who would take her place? (come) 7. It seems as if it ____ already summer now. (be) 8. I wish I _____ him the day before yesterday. (see) 9. I made the suggestion that they _____ the plan they had made. (stick) 10. It is suggested that a study plan _____ right now. (make) 11. They required that we _____ them get in the crops. (help) 12. It was ordered that no smoking _____ in the library, which made the smokers unhappy. (allow) 13.I’d rather Tom _____ tomorrow. (come) 14.It is about time you ____ the medicine, sir. (take) 15.If there _____ no electricity in the future, our life _____ a lot. (be, change) 16.Without the Communist Party there ____ New China. 17. What would have happened if you her child? (not help) 18. It is strange that he so. (think) 19. I wish I my uncle yesterday. (meet) 20. Galileo insisted that the earth round the sun. (move) 21. I was very busy yesterday, otherwise I to the meeting. (come) 22. Supposing the weather bad, where would they go? (be) 23. If only I to my parents’ advice!(listen) 24. I to stay there for one more week, but I changed my mind. (hope) 25. His silence at the meeting suggested that he to your plan. (agree) 26. Li Ling acted that way as though he a foreigner. (be) 语言结构之虚拟语气（教师版） 用所给动词的正确形式填空 1. If I _____ him yesterday I _____ him about it. (see, ask) had seen; would have asked 2. What do you think would happen if there _____ no light during the days? (be) were