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高中英语语法之虚拟语气讲解.doc

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    • The Subjunctive Mood】 语调 (mood)是一种动词形式,用以表达说话者的意图或态度英语中的语调有三种:陈述语调、祈使语调和虚拟语调  直陈语调(indicative mood),表达所说的话是事实  祈使语调 (imperative mood),表达所说的话是祈求或命令  虚拟语调(subjunctive mood),表达说的话不是事实,或者是不也许发生的状况,而是一种愿望、建议或与事实相反的假设等  一. 虚拟语调在条件句中的应用  学习虚拟语调在条件句中的用法之前我们必须清晰条件句的种类: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也许发生或实现的,句中的条件从句与成果主句都用陈述语调 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也许或不大也许发生或实现的,句中的条件从句与成果主句皆须用虚拟语调 条件从句主句与目前事实相违背过去式(动词是be用were)should / would/could/might + 动词原形 与过去事实相违背had + 过去分词should / would/could/might + have +过去分词与将来事实相违背1) should + 动词原形ﻫ2) were + 动词不定式3) 过去式(动词是Be也可以用were)should / would/could/might + 动词原形  1. 与目前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.如果目前不下雨的话,我们就出去野餐了  (事实是:天在下雨,我们不能出去野餐表达愿望)  If he came here, he might be able to help you. 如果她来这,她就可以协助你了  (事实是:她没来这,她不也许协助你表达对她的良好印象  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.   要是当时她被邀请的话,她就会去参与这次约会了  (事实是:当时没有人邀请她,因此,她没有来参与约会表达懊悔  If she hadn't called me, I would have overslept this morning.   今天早上,她要是不叫我的话,我就会睡过头了  (事实是:她今天早上叫我了,我没有睡过头。

      表达感谢  3. 与将来事实也许相反的虚拟条件句,条件从句的谓语用动词的过去式(be的过去式用were); should+动词原形;were to+动词原形,主句用should (would, might, could)+动词原形  如:  If I were to be twenty years old next year, I would take the course of French.  来年我要是二十岁,我就会学法语  (事实是:我目前已经老了,来年我学不了法语了  If it should fail, I would try again.要是失败了,我会再试一次  (事实是:有也许失败,可我会再试表达未知虚拟过去式有时并不表达“不大也许实现的假设”,而是表达一种但愿或不但愿发生的动作  如:  If we caught the early train, we’d get there by lunch time.  如果我们赶上早班火车,到午饭时间我们就会达到那里了表但愿)  If we missed the train, we should have to wait an hour at the station. 如果我们赶不上这班火车,我们就得在车站等一小时。

      表不但愿) 4. 混合型的条件句  当条件从句与主句所表的时间不一致时,虚拟语调的形式应作相应的调节主句和从句的谓语动词并不互相呼应,这种条件句叫混合条件句较多见的混合型条件句是从句用过去完毕时(指过去行为),而主句用一般时(指目前状态) He would pass the test if he had taken my advice.如果她听了我的劝告,她目前会通过考试  If I had spoken to him yesterday, I should know what to do now.   如果昨天我对她说了,目前我就懂得该怎么办了 You would be much better now if you had taken my advice.   如果你接受了我的意见,你目前就会好得多 如条件从句用if I were...,主句则可用表任何时间的虚拟形式  如:  If I were not busy, I would have come. 如果我不忙,我就会去了were表过去) If I were you, I would go.  如果我是你,我会去的were表目前)  二. 连词if的省略 如果虚拟条件句的谓语部分有were,had和should时,可省略if,把were,had和should放到从句主语前面去,多见于书面语。

       Had you not helped me, I should have failed.要是没有你的协助,我就失败了  Were you in my position, you would do the same. 如果你处在我的地位,你也会这样干的  Should they attack us, we’ll wipe them out completely. 如果她们攻打我们,我们就把她们彻底消灭干净  三. 含蓄条件句  虚拟条件句中的条件从句有时不表出来,只暗含在上下文中,这种句子叫做含蓄条件句含蓄条件句大体有三种状况  1) 条件暗含在短语中  如: But for your help we couldn’t have succeeded in the experiment.   如果没有你的协助,我们的实验是不会成功的暗含在分词短词but for your help) What would I have done without you? 如没有你,我会怎么办呢?(条件暗含在介词短语without you 中) It would be easier to do it this way. 这样做会比较容易。

       (条件暗含在不定式短语 to do it this way中)  This same thing, happening in wartime, amount to disaster. 同样的事,如发生在战时,就会酿成大祸条件暗含在分词短语happening in wartime 中)  He must have the strength of a hippopotamus, or he never could have vanquished that great beast. 她一定是力大如河马,否则她绝不会击败那只庞大的野兽暗含条件是连词or) Alone, he would have been terrified. 如是单独一人,她是会感到胆怯的暗含条件是alone) 2) 条件暗含在上下文中 如: You might stay here forever. 你可以永远待在这儿也许暗含if you wanted to)  We would have succeeded. 我们本来是会成功的也许暗含if we had kept trying)  Your reputation would be ruined. 你的名誉会败坏的。

      也许暗含 if you should accept it) 3) 在不少状况下,虚拟式已变成习惯说法,很难找出其暗含的条件  如:  You wouldn’t know. 你不会懂得 I would like to come. 我乐意来 四. 不用if引导的条件从句  虚拟条件句中的条件从句除用if引外,还可用when, unless, lest, suppose, as if, for fear, in case, on condition 等词语来引导 如: The peasants prepared to feed the city when it should be freed.   农民已准备在这座都市解放后供应粮食 Lest you should not have heard all, I shall begin at the beginning.   我怕你没有听全,因此我再从头开始讲一遍  Unless I were well, I wouldn’t be at school. 除非我好了,否则我不会上学  Suppose you were given a chance to study in America , would you accept?   如果给你一种到美国学习的机会,你会接受吗?(suppose 或 supposing =what if) Supposing it were so?(=Supposing it were so,what would happen?)  要是这样的话,会怎么样呢? He can use the bicycle on condition that he should return it tomorrow.   如果明天能还回来,她就可以借用这辆自行车。

       In case I forget , please remind me of my promise 如果我忘了,请提示我的诺言  Susan is walking slowly ,as if she were tired. 苏珊走得很慢,就像是累了似的  与if同样,上述词语所引导的条件从句亦可用直陈语调,表也许实现或发生的事  虚拟语调补充解说(第二学时)  虚拟语调除重要用于条件句(也就是状语从句)外,还可用于主语从句、宾语从句、表语从句、定语从句等 1. 虚拟语调在主语从句中的应用  “常用在It is (was)+形容词 / 过去分词+that引导的主语从句”的句型中的主语从句要用虚拟语调主语从句的谓语用should+动词原形(或should+have+过去分词)或只用动词原形(特别是美国英语)should在此是助动词,自身并无实义,这种主语从句中的should有时有感情色彩  It's important that we(should)。

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