湖南省汝城二中高三英语语法复习系列讲解----特殊的虚拟语气词：should

英语should型虚拟语气有哪些注意事项在英语中，所谓should型虚拟语气，指should+动词原形，should可以省略。

以下三种词类后接从句的时候，从句动词需要使用should型虚拟语气。

一、“意志动词”。

“意志”动词表示“主张”。

* 此类动词可以概括为：一个坚持：insist五个建议：suggest, advise, propose, recommend, urgen个要求：order, request, require, demand, command, 等等* “意志”动词的名词形式、形容词形式之后的从句中也需要使用should型虚拟语气。

例如：I advise that you (should) take out insurance. 奉劝你务必办理保险。

= My advice is that you (should) take out insurance.= It is advisable that you (should) take out insurance.* 注意insist和suggest这两个动词。

它们既可以接表示“主张”的从句，也可以接表示“事实”的从句。

前者需要使用should型虚拟语气，后者的动词形式视情况而定。

例如：a. He insists that she (should) come. 他执意要她来。

(主张)b. He insists that she did come. 他一口咬定她来过。

(事实)c. He insisted that he was innocent and that he (should) not be to blame. 他认定自己是无辜的(事实)，不应受到责怪(主张)。

二、“评判”性形容词。

包括两类：1.“重要性”：important, significant, essential, vital, fundamental, necessary, 等等;2.“惊讶、奇怪”：strange, amazing, surprising, natural, 等等。

高中英语知识点归纳虚拟语气的用法总结高中英语知识点归纳——虚拟语气的用法总结虚拟语气是英语语法中的一个重要部分，它用于表达说话者的愿望、假设、建议或命令等不真实的情况。

在高中英语学习中，掌握虚拟语气的用法对于理解和运用英语语法非常重要。

本文将对虚拟语气的用法进行总结和归纳。

一、虚拟语气的用途虚拟语气用于表现非真实情况或不可能实现的愿望、条件、建议、怀疑、命令、警告等。

主要分为以下几种情况：1. 虚拟条件句：表示与现实相反的情况。

例如：If I were you, I would study harder.（如果我是你，我会更加努力学习。

）2. 虚拟愿望句：表示与现实相反的愿望。

例如：I wish I could go on a vacation.（我希望我能去度假。

）3. 虚拟建议句：表示对现实的建议。

例如：I suggest that he take a break.（我建议他休息一下。

）4. 虚拟命令句：表示对现实的命令或要求。

例如：The teacher requested that all students submit their homework on time.（老师要求所有学生按时提交作业。

）5. 虚拟警告句：表示对现实的警告或威胁。

例如：If you don't stop talking, I will call the police.（如果你不停止讲话，我会报警。

）二、虚拟语气的形式1. 虚拟语气在动词的形态上表现为过去式（一般过去时或过去完成时）。

例如：I suggested that he go to the library.（我建议他去图书馆。

）2. 虚拟语气在动词的形态上表现为"were"而不是"was"。

例如：If I were you, I would apologize.（如果我是你，我会道歉。

）3. 虚拟语气在情态动词的用法上表现为"should" + 动词原形。

虚拟语气（1）——倒推时态类定义：虚拟语气是一种动词形式，有两种意思 1.表示说话人所说的不是事实，而是一种假设、猜测、怀疑等（非真实条件状从和让步状从）2.表示说话人的愿望、要求、命令、建议（名词性从句：主宾表同）使用情景 1.用来表达一个假设或纯粹的意愿（与事实相反或不太可能实现）（如果我是宇航员，我要在月球上跳舞）2.用来缓和语气，使句子更委婉、礼貌、得体（如果你能接受我的邀请，我将不胜感激）3.表示烦恼、不耐烦等情绪（你要是能考上大学，全家都烧高香了）4.表示适度的责备或批评（如果你那时更耐心点，现在我们都成功了）5.表示美好的祝愿或祝福（祝你成功）1.虚拟条件句一般虚拟条件句混合虚拟语气（错综时间条件句）定义：条件状语从句表示的行为和主句表示的行为发生的时间不一致例子：If you had followed my advice, you would be better now.如果那时你听了我的建议，现在已经好了If it hadn’t been for you, I would have to make another trip there tomorrow.如果不是你的话，我明天还要再走一趟。

If you had studied hard before,you would be a college student now.如果你以前努力学习的话，你现在就是大学生了。

省略+倒装当虚拟条件句的谓语动词中含有were，should，had时，if可以省略，并将were,should,had提前于句首，变为倒装句。

如果虚拟条件句是否定句，not 保留在原处If he should agree to go there, we should send him there.= Should he agree to go there,we should send him there.If she were there,she would agree with us.= Were she were, she would agree with us.If he had learnt about computers,we would have hired him.= Had he learnt about computers,we would have hired him.含蓄虚拟条件句定义：有时为了表达的需要，在虚拟语气中并不总是出现if引导的条件状语从句，而是通过其他手段来代替条件从句分类：1) but for....=(If it+be not for) ；without；Without your help ,we couldn’t have finished the work ahead of time.= But for your help,we couldn’t have finished the work ahead of time.= If it hadn’t been for your help,we couldn’t have finished the work ahead of time.没有你的帮助，我们不可能完成任务。

高三英语虚拟语气知识点虚拟语气是英语语法中的一种特殊语气，用来表示与事实相反、与现实不一致、或者表达愿望、建议、命令、要求等情态。

掌握虚拟语气的用法对于高三英语考试非常重要。

本文将介绍虚拟语气的常见用法及例句。

一、与现在事实相反的虚拟语气虚拟语气常用于表示与现在事实相反的情况。

以下是一些常见的虚拟语气用法：1. 与现在事实相反的虚拟语气：如果主句是现在时，从句用过去时。

例句：- If I were you, I would study harder.（与现实相反）- I wish I had more time to travel.（与现实相反）2. 表达建议、要求或命令等的虚拟语气：主句用“should”或“ought to”引导，从句用动词原形。

例句：- It is necessary that she should arrive on time.（建议）- He demanded that they leave immediately.（命令）二、与过去事实相反的虚拟语气虚拟语气还可以用来表示与过去事实相反的情况。

以下是一些常见的虚拟语气用法：1. 与过去事实相反的虚拟语气：如果主句是过去时，从句用过去完成时。

例句：- If he had studied harder, he would have passed the exam.（与过去事实相反）- I wish I hadn't eaten so much.（与过去事实相反）2. 表达愿望、建议或命令等的虚拟语气：主句用“should”或“ought to”引导，从句用动词原形或过去时。

例句：- It is high time that he applied for a job.（建议）- I wish he would stop talking.（愿望）三、与将来事实相反的虚拟语气虚拟语气还可以用来表示与将来事实相反的情况。

以下是一些常见的虚拟语气用法：1. 与将来事实相反的虚拟语气：如果主句是将来时，从句用过去完成时。

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。

关于虚拟语⽓的⽤法与理解（shouldhavedone）“should + 完成时”，主要有以下四种⽤法：⼀、“should + 完成时”，表⽰“过去本应该做某事，⽽实际未做”，属于虚拟语⽓的⼀种。

You should have reported them to the police. 你应当向警⽅控告他们的。

The problem should have been ironed out months ago. 这个问题⼏个⽉前就该解决了。

You should have been more careful in money matters. 在钱⽅⾯，你本当更⼩⼼点的。

I'm to blame. I should have thought of that. 都怪我，我应该想到这⼀点。

You should have known better than to talk like that. 你本应更懂事⽽不致说这样的话。

⼆、“should + 完成时”与虚拟条件连⽤，表⽰“与过去事实不符或相反的虚拟语⽓”。

【说明】if 从句⽤过去完成时，主句⽤“should + 完成时”，主句的主语仅限于使⽤第⼀⼈称。

这时，should 可以⽤would 代替。

例如：If I had seen Mary I should/would have invited her. 我当时要是看到玛丽的话我本会邀请她的。

If I had received the present, I should/would have thanked him. 如果我收到了礼物，我是应当向他道谢的。

I should/would not have laughed if I had thought you were serious. 如果我想到你是认真的，我就不会笑了。

也可以⽤其他结构代替if 条件句。

例如：But for your advice, I should/would have failed. 要不是你的忠告，我会失败的。

求虚拟语气的用法，特别是should型虚拟。

求虚拟语气的用法，特别是should型虚拟。

一.should 在含有条件的虚拟语气中的运用1. 虚拟现在时表示与现在事实相反的假设，其if 从句的谓语形式用动词的过去式(be 一般用were)，主句用would/ should/ could/ might +动词原形。

I’d e too if I had time to spare.2.虚拟过去时是表示与过去事实相反的假设，if 从句的谓语形式用过去完成时即had＋过去分词，主句用would / should / could / might + have +过去分词。

If the hurricane had happened during the daytime there would have beenmore deaths.3.虚拟将来时是表示对将来实现的可能性很小的或不确定的假设。

If从句的谓语形式用一般过去式或用were to / should +动词原形，主句用would /should /could/ might +动词原形。

If I were to met him tomorrowshould, I should ask him about it.Should there be any trouble with the boiler, the automatic controlling unit would cut off the fuel oil supply.If there were no gravity, we should not be able to walk.二.should在宾语从句中的运用.1)某些动词后所接宾语从句中的谓语动词要求用虚拟语气，用来表示建议、命令和要求等。

其形式为：（should）+ 动词原形。

常这样用的动词有ask 要求advise 劝告determine 决定decide 决定mand 命令 insist 坚持intend 打算 move 提议prefer 宁愿 propose 提议order 命令 remend 推荐request 要求 require 要求suggest 建议 urge 主张demand要求 desire 渴望direct 命令.例如：He insisted that the meeting be put off.他要求推迟那个会议。

高考语法虚拟语气虚拟语气在高考语法考试中占据很重要的位置。

虚拟语气是用来表示非真实的、不确定的、假设的情况，或表达愿望、建议、命令等的语气。

下面我将详细介绍虚拟语气的各种形式及其用法。

一、虚拟语气的情态动词虚拟语气通常由情态动词来表示，包括：1. should + 动词原形，可以表示建议或命令。

2. would + 动词原形，可以表示请求或愿望。

3. could + 动词原形，可以表示能力、请求或愿望。

4. might + 动词原形，可以表示可能性。

5. had + 过去分词，可以表示对过去情况的假设。

6. were + 动词原形，多用于第二和第三人称单数的句子中，表示假设或愿望。

二、虚拟语气的用法1. 虚拟条件句虚拟条件句常用在表示条件的从句中，表示与现在或将来事实相反的假设情况。

主句中常使用情态动词或“would”来表示假设的结果。

例句1：If I were a bird, I would fly in the sky.（假设的情况是我是一只鸟，结果是我会在天空中飞翔。

）例句2：If you had studied harder, you would have passed the exam.（假设的情况是你学习更努力了，结果是你已经通过考试了。

）2. 虚拟语气用于表达命令、建议、要求、要求等虚拟语气还常用于表达命令、建议、要求等。

在这种情况下，常用“should + 动词原形”或“would + 动词原形”。

例句3：You should help your parents with the housework.（你应该帮助你的父母做家务。

）例句4：I wish you would listen to me.（我希望你能听我说。

）3. 虚拟语气用于表达愿望虚拟语气还常用于表达愿望，其中“would”是常见的情态动词。

例句5：I wish I could play the piano.（我希望我能弹钢琴。

标题：关于"Should"的语法知识点目录1. Should的基本用法2. Should表示建议和宜3. Should表示责任和义务4. Should引导虚拟语气5. Should在条件句中的用法6. 总结1. Should的基本用法"Should"是情态动词，常用来表示虚拟、推测或建议。

在句子中作情态动词时，应置于主语后面，后接动词原形。

例如：- He should be here by now.（他现在应该在这儿了。

）- You should study harder.（你应该更努力学习。

）- They should have arrived by now.（他们现在应该已经到达了。

）2. Should表示建议和宜"Should"常用来表示建议、劝告或适宜的事情。

在这种情况下，"should"后面的动词一般为原形。

例如：- You should take a break.（你应该休息一下。

）- We should start early.（我们应该早点开始。

）- She should see a doctor.（她应该去看医生。

）3. Should表示责任和义务"Should"也可以表示责任和义务，通常用于表示某种道德上的义务或应尽的责任。

例如：- You should apologize for your mistake.（你应该为自己的错误道歉。

）- We should help those in need.（我们应该帮助有需要的人。

）- She should have returned the money.（她本应该把钱退还。

）4. Should引导虚拟语气在虚拟语气中，"should"常用来表示主观的推测或建议。

在这种情况下，"should"后面的动词一般为原形。

高中英语语法讲解：虚拟语气一、概述：1.虚拟语气用来表示一个说法并非真实情况，而是说话人的想象假设或主观建议。

2.与虚拟语气相对应的是陈述语气，表示该说法是真实的，符合现实的，用于陈述句、疑问句、感叹句等。

3.虚拟语气的构成有两种：(1) (should) do(2) 时态倒退与现在事实相反：一般现在时do→一般过去时did；be动词(am/is/are) 都变were与将来事实相反：一般将来时will do→过去将来时would do与过去事实相反：一般过去时did→过去完成时had done二、使用虚拟语气的11种情况1.表示“建议、命令、要求、坚持”的词+ should 虚拟语气, 表示“应该做某事”，should 可省略。

常见此类单词有：suggest/suggestion, advise/advice, recommend/recommendation, propose/proposal, order/command/demand, urge, require/request, insist等。

He made a suggestion that TV series (should) not take up too much of students' time.It was demanded that a doctor (should) be called in immediately to save the general's life.注：(1) suggest意为“暗示、表明”(2) insist意为“坚持说、坚持认为”时，后加陈述语气，表示真实情况。

What he said suggested that he wasn’t in favor of watching too much TV.She insisted that she was (be) right and (should) not be punished (not punish).2.在句型It's important/vital/necessary/essential/natural/a pity/shame/strange/... that...中用should虚拟语气，表示“应该/竟然做事某”，should一般不省。

(完整版)情态动词should的讲解情态动词should一：用来表示现在或者将来的责任、义务，译为应该、应当，在此情况下可与ought to，be supposed to 互换使用。

例如：You should complete your text in time。

二：用来表示意外、惊喜、不可思议的情况,译为竟然、竟会。

例如：He should lie to me.（他竟然骗我）三:表示猜测、推论,译为可能、应该、总该例如：They should be home by now。

（他们现在应该回家了）四：在虚拟语气中1：在条件句中，表示对将来的假设例如：If it should rain tomorrow，I wouldn’t go. (= Should it rain tomorrow, I wouldn’t go。

）如果明天下雨我就不去了2：在suggest、decide、advise、order、demand、request、insist等表示建议、决定、劝告、命令、要求等动词后面,形式为主语+(should）+动词原形例如:He insisted that we （should ）take up the matter at the meeting 他坚持要我们在会上提出这个事项。

3：用在it is suggested/requested/ordered/proposed之后的由that引导的主语从句中例如： It is requested that you （should） give a performance at the party。

大家要求你要在聚会上表演.4:用在suggestion/order/advice/request等名词之后引导的从句中例如：My idea/ motion/ advice/ is that we (should） do more eye exercises every day。

虚拟语气should的用法人们在使用英语时，常常会碰到虚拟语气，而虚拟语气should 就是其中之一。

虚拟语气should是专门用来表示现在在虚拟条件下的行为的一种语气，因此是一种非常灵活的语言形式，在口语和书面表达中都会经常使用到。

本文将介绍虚拟语气should的基本形式、用法和相关例句，以帮助大家更好地理解并正确使用这种语气。

1.虚拟语气should的基本形式虚拟语气should的基本形式是should +词原形，如：I should go.They should study.在这种结构中，should常常暗示可能性，表明一种假设的情况下的结果。

2.虚拟语气should的用法虚拟语气should常用于两种情况：（1）表示建议或劝告在表示建议或劝告时，should可以用来表示某种行为是依据正常礼仪规范或是理智所应有的。

例如：You should apologize for your behavior.他们应该承认他们的过错。

（2）表示虚拟条件虚拟语气should也可以用来表示虚拟条件，如：If we had enough time, we should visit the museum.如果我们有足够的时间，我们应该去参观博物馆。

3.虚拟语气should的相关例句（1）He should go now.他现在应该走了。

（2）If I had enough money, I should buy a new car.如果我有足够的钱，我应该买一辆新车。

（3）You should not drive so fast.你不应该开得那么快。

（4）If I had known about it earlier, I should have come to help.如果我早知道，我应该来帮忙的。

（5）If you finish your work on time, you should take a holiday.如果你按时完成工作，你应该休息一下。

落堕市安心阳光实验学校用“（should）＋动词原形”表示“建议或要求”考点1. 用动词及其派生词来表示“想让某人做某事”在英语中，在表示命令、建议、要求等语气时，常用“should＋动词原形”，且should可以省略。

这几种情况，可以概括为“想让某人做某事”。

The doctor suggested that he (shoul d) try to lose his weight。

(医生想让他减肥)常见的动词有一个坚持：insist；两个命令：order, command；四条建议：suggest , advise, propose，recommend；四项要求：demand, request, require, ask；另外有：prefer。

注意：suggest作“暗示、表明”时、insist作“坚持认为”时不用虚拟语气。

这种“想让某人做某事”的语气，可以出现在宾语从句、表语从句、同位语从句和主语从句中。

I suggested that we (should) send them a message.（宾语从句）My suggestion is that we (should) send them a message.（表语从句）I made a suggestion that we (should) send them a message.（同位语从句）It was my suggestion that we (should) send them a message.（主语从句）①一个坚持insist1.The father insisted his daughter ______ a rich man.A. would be engaged toB. be engaged toC. should engaged toD. must be engaged to2.Mrs. Black insists ______ in that old hotel.A. not to stayB. not stayingC. staying notD. that she not stay②两个命令order, command3.The manager was angry and ordered that this work ______ tomorrow.A. be finishedB. finishC. was finishedD. would finish4.It was ordered that no smoking ______ in the library.A. should allowB. be allowedC. will be allowedD. is allowed5.The order came that the medical supplies ______ to Beijing for theSars soon.A. would be sentB. should sendC. be sentD. must be sent③四条建议suggest , advise, propose, recommend6.She made a suggestion that the plan ______ carefully.A. be consideredB. was consideredC. should considerD. would be considered7.My suggestion is that she ______ more exercise, which will do a lotof good to her.A. takesB. must takeC. takeD. took8.【2013陕西】My mom suggests that we ______ eat out for a change thisweekend.A. shouldB. mightC. couldD. would9.Jane’s pale face suggested that she ______ ill, and her parentssuggested that she ______ a medical examination.A. be; should haveB. was; haveC. should be; hadD. was; has10.The doctor’s advice is that the patient ______ about his real physicalcondition.A. be not toldB. not be toldC. will not be toldD. must not be told11.I think it advisable that he ______ for Tokyo soon.A. will leaveB. may leaveC. leaveD. leaves12.The Reform Club proposed that wages ______.A. would be raisedB. be raisedC. were to be raisedD. were raised13.【2010福建】Teachers recommend parents ______ their children under12 to ride bicycles to school for safety.A. not allowB. do not allowC. mustn’t allowD. couldn’t allo w14.His English teacher recommends that he ______ a regular degree program.A. beginsB. beginC. will beginD. is beginning④四项要求demand, request, require, ask15.It was required that each student ______ enough food for the picnic.A. bringB. broughtC. would bringD. had brought16.It is requested that every student ______ a plan for the next semester.A. makesB. will makeC. makeD. would make17.A request is made to the investigation committee that a decision ______as soon as possible.A. be doneB. must be madeC. be madeD. is to be made18.The teacher demanded that the work ______ before 4 o’clock.A. finishedB. be finishedC. should finishD. finish19.Their demand is that their wages ______ increased by 20%.A. beB. shouldC. will beD. must be20.Tom’s father, as well as his mother, ______ in New York for a fewdays more.A. ask him to stayB. ask he to stayC. asks he staysD. asks he stay⑤另有：urge, prefer21.The management urged that the cost of production ______.A. to be further reducedB. was further reducedC. be further reducedD. should further reduced22.The old worker urged that we ______ cheaper materials instead.A. useB. usedC. would useD. will use23.We prefer that the plan ______ before being put into execution.A. is fully discussedB. must be fully discussedC. be fully discussedD. will be fully discussed 24.In the past men generally preferred that their wives ______ in thehome.A. workedB. would workC. workD. were working考点2. 用形容词来表示“想让某人做某事”在“It is (was)+形容词（或过去分词）+that…”结构中，当形容词是表示愿望、建议、请求、命令、可能、适当、较好、迫切、紧近、重要等词义时，后面的主语从句的谓语也用虚拟语气。

高三虚拟语气语法知识点在高三英语学习中，虚拟语气是一个重要的语法知识点。

掌握虚拟语气的用法，不仅可以提高语言表达的准确性，还能够帮助我们更好地理解和阅读文本。

本文将为大家介绍关于高三虚拟语气的几个重要知识点。

一、虚拟语气的基本用法虚拟语气是一种表达假设、愿望、建议等非真实情况的语气，分为与现在事实相反的虚拟和与过去事实相反的虚拟。

虚拟语气常常由动词的过去式或should/were等形式来表示。

下面是一些常见的虚拟语气用法：1. 与现在事实相反的虚拟：- If I were you, I would study harder.（与现实相反的假设）- I wish I had more time to travel.（对现在情况的非真实愿望） - It is high time that he stopped procrastinating.（表示应当发生但事实尚未发生的情况）2. 与过去事实相反的虚拟：- If he had arrived on time, he would have caught the train.（与现实相反的假设）- I wish I hadn't made that mistake.（对过去情况的非真实愿望） - If I had known, I would have helped you.（对过去未知情况的推测）二、虚拟语气在条件句中的用法虚拟语气经常出现在条件句中，条件句分为三种类型：与现在事实相反的虚拟条件句、与过去事实相反的虚拟条件句和对将来可能情况的虚拟条件句。

下面是对应的用法：1. 与现在事实相反的虚拟条件句：- If he were here, he would help you.（如果他在这里，他会帮助你。

）- If I had a lot of money, I would travel around the world.（如果我有很多钱，我会环游世界。

should动词原形的虚拟语气几个值得注意的知识点1、在for fear that，in case，lest引导的从句中，若用虚拟语气时，从句谓语为：（should）+ do。

并且should能省略（for fear that，lest），但是in case不能省略She examined the door again for fear that a thief (should) come in.她又把门检查了一遍，以防盗贼的进入。

He started out earlier lest he (should) be late.他早早地就出发了以防迟到。

2、在so that，in order that所引导的目的状语从句中，从句中的谓语为：can / could / may / might / will / would /should + do He goes closer to the speaker so that he can hear him clearer.他走近说话的人以便能听得更清楚。

He read the letter carefully in order that he should not miss a word.他把信读得很仔细以便不漏掉一个字。

一想要(desire) 一宁愿(prefer) 一坚持(insist)二命令(order ，command) 三建议(advise ， suggest ， propose/recommend) 四要求(demand ， require ， request ， ask)中，无论主句谓语动词为何种时态，从句的谓语动词都用：'should + do'。

should可以省略。

eg：He suggested that we (should) take the teacher's advice.He insisted that we (should) take the teacher's advice.He demand that we (should) take the teacher's advice.He ordered that we (should) take the teacher's advice.insist意为“坚持某种动作”才用虚拟语气；意为“坚持某种观点，某个事实”则不用虚拟语气。

高考英语中的虚拟语气虚拟语气表示说话人的愿望，假设，猜测或建议，而不是表示客观存在的事实。

一、should+动词原形（表示未发生的动作）1.在动词demand, order, suggest, insist, require, request, command, desire等+that从句中（should可省略）2.用在上述动词相关的名词+that从句中（should可省略）3.用在It’s important / strange / necessary / natural…+that从句中（should可省略）4.It’s (high / about)time +(that)从句中（should不省略）Notes:1）当insist 表示坚持要求该如何做一个未来动作或该做什么动作时，可接should+动词原形；如果insist 表示的是坚持认为过去的或现在的情况怎样或是什么时，则that从句中动词的时态须与所表示的时间一致，不可用虚拟语气。

Eg. He insisted that he had done right. 他坚持认为（说）他做得对。

（陈述语气）He insisted that I should go there. 他坚持要求我去那。

（虚拟语气）2）suggest 表示“建议”接宾语从句用虚拟语气；作“暗示，表明”讲，接宾语从句不用虚拟语气。

3）It’s time that 从句中除了用should+动词原形外，还可以用动词的过去式。

即It’s time sb. did sth.比较：１）would rather sb. did sth（宁愿某人会做某事）与现在或将来事实相反。

２）would rather sb. had done sth (宁愿某人做过某事)---与过去事实相反。

二、情态动词＋have done-----表示与过去事实相反1.could have done 本能够做而未做2.should / ought to have done本应该做而未做3.needn’t have done本不必做而做了4.might have done 本可能做而未做5.would rather have done 宁愿做过某事6．would ( should) like / love to have done 本想做而未做Notes:注意区别：情态动词＋have done -----表示对过去动作或状态的推测（其中情态动词无时态之分）１）．Can / Could +主语＋have done? (疑问句)可能做过某事吗？２）．Can’t / Couldn’t have done (否定句)不可能做过某事３）．may/ might + have done (肯定句)可能做过某事４）。

should虚拟语气的用法归纳Should虚拟语气是英语中的一种表达方式，它的用法灵活，可以提供给说话者更多的灵活性、可操纵性和可信度。

在英语语言学中，这种虚拟语气具有重要的地位。

Should虚拟语气既可以表示虚拟条件，也可以表示陈述句。

因此，理解与正确使用这种虚拟语气是英语学习者必备的知识。

1、Should虚拟语气的用法Should虚拟语气的用法相当多，可以表示一般的虚拟意图，也可以表示祈使句。

它也可以表示一种强烈的表达、勉励或建议，表示怀疑或可能性的句子，还可以表示慷慨的建议，以及表示意图和建议的句子，可用来表示暗示、建议、要求和愿望等各种意图。

2、Should虚拟语气表示虚拟条件Should虚拟语气用来表示虚拟条件时，表达的意思是“假如……”，它可以用来表示从句中情况发生可能性很小或根本不可能发生，如：If you should find the keys, please let me know.假如你发现了钥匙，请让我知道。

If he should come late, I won wait for him.如果他来晚了，我不会等他。

3、Should虚拟语气用于祈使句Should虚拟语气用于祈使句时，表示的意思是“应该”、“最好”或“务必”，即强调某种动作或状态，如：You should take the medicines on time.你应该准时服药。

You should be careful when you cross the street.你过马路的时候应该小心。

4、Should虚拟语气用于发出建议Should虚拟语气用于发出建议时，表示的意思是“我建议你要”、“我认为你应该”，即帮助他人更好地做出正确的决定或选择，如：You should prepare thoroughly for the exam.你应该为考试做好充分的准备。

You should take a break if you are tired.如果你累了，应该休息一下。