虚拟语气之should
一、Should的虚拟语气用于表达某人该应做某事，或者某事应该被做，Should 往往可以省略。
1、用于下面动词之后的宾语从句
建议advise, suggest, propose, recommend
命令order, command
请求ask, demand, require, request
敦促urge
希望desire
坚持要求insist
打算intend
如：I insisted that he (should) stay. 我坚持要他留下。
He urged that they (should) go to Europe. 他敦促他们到欧洲去。
He suggested that we (should) leave early. 他建议我们早点动身。
He ordered that it (should) be sent back. 他命令把它送回去。
I ask that he (should) leave. 我要求他走开。
He requires that I (should) appear. 他要求我出场。
She desires that he (should) do it. 她希望他做此事。
注意：suggest表“暗示” insist表“坚持认为”不用虚拟语气
比较：
He insisted that I had read his letter. 他坚持说我看过他的信。
He insisted that I should read his letter. 他坚持要我看他的信。
He suggested that we (should) stay for dinner. 他建议我们留下吃饭。
Her pale face suggested that he was ill.他苍白的脸色暗示他生病了
2、用于上述动词相应名词之后的表语从句或同位语从句
这些名词为oder，suggestion（suggest的名词），demand，proposal（propose 的名词），advice（advise），request，requirement（require的名词）
如：Our suggestion is that you（should）be the first to go．（表语从句）我们的建议是你应该第一个去。
He gives me a suggestion that we should leave early.(同位语从句)
3、用于主语从句中
分两小类，（1）是it is/was +上述动词过去分词+that clause
如：It is ordered/demanded/required/suggested/desired/recommended/proposed that the army (should) get there by 4 a.m.
这时it是形式主语，that后的从句才是真正主语。
（2）it is/was +形容词+that clause
这类形容词往往表示紧急重要的，或带有强烈感情色彩，如necessary, important, urgent, essential, impeaitive, vital等。
例句：It was necessary that your homework should de handed in time.
二、should用在lest（以免），for fear that(以免)，in case(以防)引导的目的状语从句中
如：She walked quietly lest/in case/for fear that she (should) wake up her roommates.
三、It’s time + that clause
从句谓语通常用过去式表示(早)该干某事了
*有时也用过去进行时或“should+动词原形”(较少见，且should不能省略) ex. It’s time we went [were going, should go]. 我们该走了。
It’s time I was in bed. 我该上床睡了。(不用were)
It's time = It is (the very/high/right/about) time
四、练习
1、It was urgent that a meeting____before the final decision is made.
A、will be arranged
B、must be arranged
C、be arranged
D、would be arranged
虚拟语气详解（自用版） 虚拟语气是一项语法难点，为了让学员们便于理解与记忆，我们把虚拟语气分成三大块来讨论： 1．名词从句中的虚拟语气标志词+should+动词原形 2．条件从句中的虚拟语气①三种基本态②倒装虚拟句③混时虚拟句④含蓄虚拟句⑤跳层虚拟句 3．其它情形中的虚拟语气（wish/would rather/It’s high time…/If only…/lest） 一．三种基本形态（1） 表虚拟的时间if从句谓语形式主句谓语形式 现在：did / were would (should, might, could)+do 过去：had done/ had been would (should/might/could)+have done(been) 将来：were to/ should+do would (should, might, could)+do 三种基本形态（2）（这是基础，建议牢记下面的例句，争取能脱口而出） 与现在事实相反：If I had enough money, I would buy a book. 与过去事实相反：If I had had enough money, I would have bought a book. 与将来事实相反：If I were to have enough money, I would buy a book. If I should have enough money, I would buy a book. 二、倒装虚拟句（只能与过去/将来事实相反，省去if，只有三种倒装形式） Had I had enough money, I would have bought a book. Were I to have enough money, I would buy a book. Should I have enough money, I would buy a book. 三、混合时间虚拟语气（主要是抓住时间状语） (对过去事实虚拟+对现在事实虚拟) If I had studied English at school, I could read the English novel now. (对现在事实虚拟+对过去事实虚拟) If she were not so careless, she wouldn’t have made such a mistake. 四、含蓄虚拟句（在四级考试中目前还未出现此考点，但在阅读中常见） 3. 虚拟语气用在主语从句中。在句型“It is important (necessar y, strange, natural等) that...” 中，that 后面的从句中的谓语动词用(should) + 动词原形。 It's necessary that we should have a walk now. 我们现在有必要出去散散步。 What would I have done without you? But for their help, I would not have finished the task. But that the doctor arrived on time that day, they would have been dead.
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。
If引导非真实条件句（虚拟语气）语法教学设计 汉中市宁强县天津高级中学外语组：邱怡 一、?高中英语课程标准？分析： 虚拟语气这一语法项目是各类英语考试中心测试的重点之一，在高考题型中都有可能会涉及到，是高中阶段英语学习的一个重点和难点，也是高考英语常考的一个考点，掌握好虚拟语气对于语言理解和运用也具有重要的意义。 1.什么是虚拟语气即虚拟语气的概念； 2.掌握if引导虚拟语气的语法规则； 二、学情分析： 我所在的学校是一所山区高中，学生英语学习习惯差，语法知识混乱。很多学生学习英语困难，基础知识不扎实，在实际做题时常常无从下手，不能灵活运用。 三、教学目标： 1.知识与技能目标：掌握if引导虚拟语气语法的基本规则；能解决有关虚拟语气的习题。 2.过程与方法目标：教师讲解引导，举例并做练习 3.情感和价值目标：通过教师主动性和创造性的发挥，激发学生的学习兴趣，体验成就感。 四、教学重难点： 1.教学重点：了解和掌握if引导虚拟语气语法项目的基本规则 2.教学难点：能运用语法规则去完成各种练习，并在实际语言活动中去灵活应用，培养学生的语言运用能力和英语思维。 五、教学和学法方法： 教法讲授法：情景教学法，任务型教学法 六：教学手段： 多媒体辅助教学 七、教学过程： stepl Leadi ng in Show the following questions on the screen ，ask students to answer the questio ns will you do when you finish education you had 100 milli on yua n, what would you do Show a picture from a film which stude nts are familiar with, and list senten ces used subj un ctive mood in the film. （通过这几个问题的讨论，让学生了解虚拟语气的基本概念，引出if非真实条件句） step2 Prese nting Suppose three con diti ons of prese nt, past and future senten ces. First con diti on 1. If I were you, I would seize the cha nee to relax myself. am too busy now. If I had time, I would go shopping with you. Con cludi ng:
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）
虚拟语气在从句中用should的情况 1. 在建议、要求、命令、想法后的动词后的宾语从句里, 用should + 动词原形, should 可以省略. 如advise, agree, command, decide, demand, determine, indicate, insist, order, propose, request, require, suggest, urge. The doctor suggested that she (should) take good care of herself. 2. 在建议,要求,命令,想法后的名词后的从句里, 用should + 动词原形, should可以省略. 如 advice, agreement, command, decision, demand, determination, indication, insistence, order, preference, proposal, request, requirement etc. It was Bill’s suggestion that everyone (s hould) have a map. (主语3. 在It is/was +形容词后that引起的主语从句中用should的结构, should 可以省略。这类形容词常见的有: advisable, anxious, compulsory, crucial, desirable, eager, essential, impossible, improper, important, natural, necessary, obligatory, possible, preferable, probable, recommended, urgent, vital; strange, surprising, unnatural，etc. It's natural that she (should) do so. It is important that we (should) learn English well. 4. 在It’s （about）/（high）time 后的that 从句中, 用过去式, 有时也可用should + do 的形式表示“该是做什么的时候” should不能
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)
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．。
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.
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.
if 引导的非真实性条件状语从句即虚拟语气 通过动词形式的变化来表示说话人对发生的动作或存在的状态所持的态度或看法的动词形式称为语气。.英语中的语气分三种：陈述语气、祈使语气、虚拟语气。虚拟语气表示说话人所说的话不是事实，而是一种祝愿，建议，与事实相反的假设或实际可能性不大的情况等（即非真实的假设）。 If 引导的条件状语从句分为真实和非真实条件句（虚拟条件句）。真实条件句表示在假设的条件下，有可能实现的情况。非真实条件句表示的是假设的或实际可能性不大的情况，故采用虚拟语气。 If he does n’t hurry up, he will miss the bus.( 真实条件状语) If he was free, he asked me to tell stories.（真实条件状语） If I were you, I would go at once.（非真实条件状语从句） If there was no air, people would die.（非真实条件状语从句）1）非真实条件句中虚拟语气的基本形式。 假设类型条件从句的动词结果主句的动词 与现在事实相反动词过去式（be只用were）would/should/could/might + 动词原形 与过去事实相反had+过去分词would/should/could/might + have + 过去分词 与将来事实相反动词过去式/(should/were to)+动词原形would/should/could/might + 动词原形
①与现在事实相反 If I had time, I would go for a walk. 如果我有时间，我就会去散步。(实际情况：我现在没有时间，也不会去散步。) If I were you, I would take an umbrella. 假如我是你的话，我会带上雨伞。(事实上我不可能是你。) I would say no if someone asked me to be in a movie. 假如有人请我当电影演员，我会表示拒绝。(事实上现虚拟语气专项练习 1．Were it not for the snowy weather, we __________all right. A. would be B. would have been C. were D. may be 2. ________more careful, his ship would not have sunk. A. If the captain were B. Had the captain been C. Should the captain be D. If the captain would have been 3. If he _________ me tomorrow, I would let him know. A. should call B. should not have been able C. were not able D. are not able 4.If you asked your father, you ______________ permission. A. may get B. might get C. should have called D. maybe get
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
二、虚拟语气的判断： 1. if 条件状语从句中虚拟语气的判断。if 条件状语从句有真实条件句和非真实条件句。假设条件可以实现的句子为真实条件句，反之为非真实条件句，要用虚拟语气。其形式分为以下三种： (1) 与过去事实相反的假设。结构为：从句的谓语动词用“had + 过去分词”，主句用“should (would, could, might) + have + 过去分词”。例如： If it had not rained so hard yesterday, we could have played tennis. 如果昨天没有下大雨，我们就能玩网球了。 (2) 与现在事实相反的假设。结构为：从句的谓语动词用过去式，系动词用were，主句的谓语用“should (would, could, might) + 动词原形”。例如： If I were in your position, I would marry her. 如果我是你，我就娶她为妻。 (3) 与将来事实相反的假设。结构为：从句的谓语动词用“should (were to) + 动词原形”，主句用“should (would, could, might) + 动词原形”。例如： If you should miss the chance, you would feel sorry for it. 如果你错过了这次机会，你会难过的。 2. 宾语从句中的虚拟语气。 (1) wish后接宾语从句中的虚拟语气：根据从句的意义来判断。 A: 表示与现在和将来事实相反的愿望，从句谓语动词用过去时态。例如： I wish they were not so late. 要是他们来得不是这么晚就好了。 B: 表示与过去事实相反的愿望，从句谓语动词用过去完成时态。例如： I wished he hadn't done that. 我真希望那件事不是他做的。 (2) 表示“要求、建议、命令”等动词后面的宾语从句中的虚拟语气。用于此结构的动词有：advise, direct, agree, ask, demand, decide, desire, insist, order, prefer, propose, request, suggest 等。从句的谓语动词用“should + 动词原形”，其中should 可以省去。例如： I insisted that he (should) go with us. 我坚持让他和我们一起去。 注意：当insist 表示“坚持认为”、suggest表示“表明，显示”时，不用虚拟语气。例如：
Should型虚拟语气练习题 1. 用于if引导的虚拟条件句中 在表示与现在或将来事实相反的非真实条件句中，谓语动词形式可用“should + do”。如：If she should refuse, they could be greatly disappointed. 【考例】This printer is of good quality. If it _______ break down within the first year, we would repair it at our expense. （2009年，天津） A. would B. should C. could D. might 2. 用于省略if的倒装句中 如果条件状语从句的谓语动词中含有should，可以省略连词if，而把should放在主语前构成倒装。如： Should he fail in the examination, he would have to wait for another year. 【考例】______ fired, your health care and other benefits will not be immediately cut off. (2006年，湖北) A. Would you be B. Should you be C. Could you be D. Might you be 3. 用于主语从句中 在“It is ＋形容词／某些动词的过去分词＋that从句”的结构中，从句的谓语动词用“（should）+ do ”虚拟语气形式来表示命令、要求和建议。这些形容词和过去分词常见的有important（重要的）、essential（必要的）、necessary（必须的）、natural（自然的）、decided（决定的）、ordered（命令的）、demanded（要求的）、proposed（建议的）、required （要求的）等。如： It is necessary that we (should) make everything ready ahead of time. 【考例】It is essential that all these figures ________ twice. (2008年，四川联考) A. check B. checked C. are checked D. be checked 4. 用于宾语从句中 表示主观判断、推测、建议、命令和要求的动词后的宾语从句中，谓语动词常采用“（should）+ do”的形式。这类动词包括advise（劝告），ask（要求），insist（坚持），order（下令），suggest（建议），command（命令），demand（要求），require（要求）等。 He insisted that a deadline (should) be set for completing the task. 【考例】The doctor recommended that you ______ swim after eating a large meal.（2009年，浙江） A. wouldn’t B. couldn’t C. needn’t D. shouldn’t 【疑难辨析】动词insist如不表示要求，而表示“坚持己见”时，宾语从句用陈述语气。同样，当suggest所表示的意思为“表明”或“暗示”时，谓语动词也不采用“should + do”的形式。如：Jane insisted that she had done nothing wrong and that she should be treated properly. The surprised look on his face suggested that he did not believe the fact.
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