① 英语语法虚拟语气
虚拟语气应该是必修3第一、二单元的知识点。
常规下虚拟语气的考查点分两个：
一是名词性从句中should do结构，should可以省略。在名词性从句中，如果出现表示“命令，建议，请求、计划”的词，不管它用于什么名词性从句，都要求使用虚拟语气。如：
He suggested that we (should) finish the task on time.这是宾语从句，suggest是“建议”的意思。又如这词用于表语从句：
His suggestion was that we (should) finish the task on time.
在这种从句中，要注意一点就是：如果从句的主语和谓语动词之间是被动关系，那么就要用(should) be done结构，就和情态动词的被动形式一样。如：
He ordered that the task (should) be finished on time.
二是条件状语从句中的虚拟语气。从句和主句的谓语动词有严格规定，如下：
从句， 主句
和现在相反： did/ were would/could/ should/ might do
和过去相反： had done would/could/ should/ might have doe
和将来相反： did/ were to do/ should do would/could/ should/ might do
如：如果当时你没帮助我们，我们不可能完成这工程。
If you had not helped us then, we couldn't have completed the project.(与过去相反)。
如果我是你的话，我会用另一种方法。
If i were you, I would use another way to do it.(与现在相反)，这句中，要注意到我用的是were.尽管主语是单数，虚拟语气中的一般过去式，不能用was.
这些是基本规则，当然还有很多其他的。如：
I wish that....这个结构是个名词性从句中的宾语从句，但是它使用的虚拟语气不与我上面讲到的相同。这个句型中，宾语从句的时态要往过去推前一步。即：如果与现在相反，用一般过去时，如果和过去相反，用过去完成时，如果与将来相反，用过去将来时。
如：I wish that i were a bird.与现在相反
I wish that i hadn't wasted a lot of time before.与过去相反。
② 英语语法题 虚拟语气19
那个国家打算发送先一架无人驾驶宇宙飞船去探索那颗行星。the idea is that +虚拟语气（动词原型表示将来时）idea 想法 这里用作计划 打算
③ 英语语法题 虚拟语气28
recommend是建议，这样的词后面要用 “(should ) + 动词原形”。should可以省略。
④ 虚拟语气的用法以及题型
虚拟语气(Subjunctive Mood)这一语法项目是各类英语考试中心测试的重点之一。虚拟语气是一种特殊的动词形式，用来表示说话人所说的话并不是事实，而是一种假设、愿望、怀疑或推测。
Ⅰ用以表示虚拟条件的虚拟语气
⒈ 用if条件从句表示的虚拟条件，是虚拟条件最普通的方式。
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，例如：If I were in your position I would marry her.
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，例如：If it had not rained so hard yesterday we could have played tennis.
③ 大多数的虚拟条件句属于上面三种情况的一种，但并不排除存在条件和后果中，一个和现在情况相反，另一个和过去情况相反，例如：If you had followed what the doctor said, you would not have been so painful now.这个句子在高中出现频率颇高。
④ 但是，如果后果用了虚拟语气，而条件却用陈述语气，这种用法是错的。
⒉ 除了表示虚假条件外，if从句还可以表示对将来的推测，由于是将来还没有发生的，所以谈不上是真实的还是虚假的，只能说这个事情发生的可能性有多大。一般情况下，可以用陈述语气的if从句来表示对一个未来事实的推测，这个事实是完全可能发生的。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，例如：Jean doesn't want to work right away because she thinks that if she were to get a job she probably wouldn't be able to see her friends very often.（1996年1月四级第44题）
⒊ 有时可以把含有助动词、情态动词、be或have的虚拟条件句中的连词if 省去，而将had , should, were 等词提到主语之前，即用倒装结构,这时候，如果出现not等否定词，否定词需放在主语后面。这种结构在口语中很少使用，但频频出现在各类考试中出现，例如：If it had not rained so hard yesterday we could have played tennis.→Had it not rained so hard yesterday, we could have played tennis.
⒋ 大多数的虚拟条件通过上面所讲的两种方法表达，但在个别句子中也可以通过介词without和介词短语but for表达，副词otherwise等表达出来。例如：We didn't know his telephone number; otherwise we would have telephoned him.（1995年6月四级第46题）值得注意的是，包含but for的句子，谓语动词必定要用虚拟形式，但包含without等短语的句子，谓语动词未必一定要用虚拟语气。
⒌ 有时虚拟条件不是明确地表达出来，而在蕴含在用but引导的从句里，于是便出现了有谓语动词是虚拟语气的主句加上谓语动词是陈述语气的but从句构成的并列复合句，例如I would have hung you but the telephone was out of order.在这样的句子里，如果主句没有用虚拟语气，或者从句用了虚拟语气，都是错的。
Ⅱ用在宾语从句中的虚拟语气
⒈ 在表示愿望的动词wish后的宾语从句中，需用虚拟语气。（wish后的that 常省略），根据主句时态，从句谓语时态相应退后一位，例如：How she wished his family could go with him.
⒉ 在具有愿望、请求、建议、命令等主观意愿的动词(desire, demand, advice, insist, require, suggest, propose, order, recommend, decide …) 后的宾语从句中需用虚拟语气。谓语动词用(should) +动词原形。值得注意的是，如果宾语从句的动词是否定的，否定词not的位置应在动词之前，而不是动词之后。例如：The head nurse insisted that the patient not be move.另外，如suggest表达“暗示”，insist表示“坚持某种说法”时，后面的从句不用虚拟语气，例如：Her pale face suggests that she is ill.或He insisted that he did not kill the boy.
除此之外，上述动词也要求用虚拟式
① 在It is+上述动词的过去分词，其后所跟的主语从句中，如It is suggested that pupils wear school uniforms.
② 在上述动词相应的名词形式作主语+连系动词，其后的表语从句中，例如His suggestion was that classed be re-scheled.
③ 在对上述动词相应的名词进行解释的同位语从句中，如：The workers raised the demand that their pay be increased to cope with the inflation.
⒊ would （had）rather , would sooner也用来表达主观愿望，它们之后的宾语从句中需用虚拟语气。谓语动词用过去式表示现在或将来，用过去完成式表示与过去事实相反，例如：I would rather he went right now.
Ⅲ其他形式的虚拟语气
⒈ it is +necessary等形容词后，that主语从句中虚拟形式使用，这类形容词包括necessary, important, essential, imperative, urgent, preferable, vital, advisable等，例如It is necessary that you listen to the teacher carefully.或者It is essential that you be able to pronounce every single word correctly.
⒉ 在It's (high/about) time 之后的定语从句中需用虚拟语气。谓语动词用过去式，例如It is high time that you went to school
⒊ 虚拟语气在as if / as though 引导的方式状语从句中的应用（谓语动词形式与wish后的宾语从句基本相同）表示与现在事实相反或对现在情况有怀疑，谓语动词用过去式。例如：He felt as if he alone were responsible for what had happened. 表示过去想象中的动作或情况，谓语动词用过去完成式。
⒋ 在lest 引导的状语从句中，谓语动词多用虚拟语气，(should )+ 动词原形。例如： The mad man was put in the soft-padded cell lest he injure himself.（1998年1月四级第38题）
⒌ 在if only 引起的感叹句中需用虚拟语气。谓语动词用过去式或过去完成式。例如： Look at the terrible situation I am in! if only I had followed your advice.
⑤ 英语虚拟语气用法（要全的，有例题）
由于虚拟语气所涉及的内容比较广，一些语法书对其的阐述也很繁杂，所以同学们在学习过程中很难掌握其用法，在使用过程中或考试时也很容易出错。为了便于大家理解和记忆，笔者对虚拟语气作了一个“新”归纳，供大家参考。
虚拟语气的使用主要体现在三个方面：虚拟条件句、虚拟语气在某些从句中的运用，以及虚拟语气的一些特殊用法。
虚拟条件句
虚拟条件句就是对现实条件的一种虚拟假设，所假设的条件一般不符合事实或与事实相反或在现实中发生的可能性极小。根据时间的不同，虚拟条件句可分为三种，即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及与将来事实相反的虚拟条件句。具体情况请看下表：
例句：
1.表示与现在事实相反
If I had enough money now ， I would lend it to you.
If I were you ， I would go to tell him the real feeling upon him.
2.表示与过去事实相反
If he had taken your advice ， he wouldn't have made such a bad mistake.
She would have come to enjoy the party if she hadn't been very busy.
3.表示与将来事实相反
I would go shopping with you if it were to be Sunday tomorrow.
If he were to be given another chance to do it again， he could certainly achieve more.
1.虚拟条件句的倒装
在虚拟条件句中，为了强调所假设条件的虚拟性，或突出说话人的一种主观愿望，虚拟条件句可用倒装结构。虚拟条件句的倒装是通过去掉if，把条件从句谓语中的助动词、情态动词或系动词放在句首实现的。例如：
Had I been（= If I had been ） in that situation， I would not have let the thief escape away with so much money.
Should there be （= If there should be） a drought， what should we do at that time ？
2.错综时间条件句
有时条件从句的动作和主句的动作发生的时间并不一致，这时谓语动词的形式应根据它所要表示的具体时间来决定。例如：
If we hadn't been working hard in the past few years ， things wouldn't be going so smoothly.
If the Party hadn 't led the Chinese people to liberate the country，Chinese people would still live a life in pain and poverty.
3.含蓄条件句
有时假设的情况并不以条件从句的形式表现出来，而是通过某个介词或介词短语（如：with， otherwise， without， but for， in that position ）、上下文或其它方式表现出来。这种句子称为含蓄条件句。例如：
But for the help from you ， I would not have had the chance to go to college.
I would never mind you making such loud noises， but， you see， my baby is in a deep sleep.
It was so quiet ； you could have heard a pin drop.
虚拟语气在某些从句中的运用
在某些词或短语后接的从句中要使用虚拟语气，表示愿望、建议或命令等。根据虚拟语气的形式不同，虚拟语气可以分为“should类”和“过去时态类”。
一、should类
这一类的虚拟语气是通过从句中的谓语动词使用“should +动词原形”体现出来的，should可以省略。其具体运用体现在：
1.在suggest ， order， demand ， propose， command， request， desire，insist等表示建议、命令、要求、意见的动词后接的宾语从句中要使用虚拟语气。
如：
He suggests that she should leave the house at once.
The leader ordered that the task（should） be finished as soon as possible.
He proposed that we （should） deal with the problem by the view of development.
2.与suggest ， order， demand ， propose， command， request， desire，insist等动词相对应的名词suggestion， order， demand ， proposal 等后的表语从句或同位语从句中要使用虚拟语气。如：
The general sent the order that the battle（should） be held on untilthe complete failure of the enemy.
My proposal is that we（should） set a deadline for handing in the plan.
3.在It is/was suggested （ordered ， demanded ， proposed ， etc. ） 结构以及necessary ， essential， important， strange， natural等形容词后的主语从句中要使用虚拟语气。如：
It's requested that we （should） keep the stability of the society for the people's peaceful life.
It is necessary that the badly wounded man（should） be treated immediately.
二、过去时态类
英语中，还有一些词或短语后接的从句或句子，也要使用虚拟语气，虚拟语气是通过句中的谓语使用过去的某种时态（如：一般过去时、过去完成时等）来体现的。
1. wish ， would rather 后的宾语从句。如：
He wished he had never been involved in such affairs.
I would rather you could teach me again.
2. as if， as though引导的从句。如：
The little boy knows so many things as if he was a man.
He acted as usual as though nothing had happened.
3.由if only （要是……，那该多好啊！）引导的惊叹句。如：
If only I had passed the test ！
If only it stopped raining！
4. It is（about/high） time 后的定语从句。如：
It is time we went out for a walk.
It was high time they had begun to prepare the experiment.
虚拟语气的其它用法
在英语中，一些表示建议、请求、劝告、愿望、祈祷、祝福或诅咒的句子，也需要使用虚拟语气。如：
Would you mind smoking here ？
May you be lucky！
Long live the people of China ！
God save me.
⑥ 高考英语虚拟语气语法总结
虚拟语气，对过去虚拟，从句用过去完成时
虚拟语气是一种动词形式，表示说话人的一种愿望，假设，怀疑，猜测， 建议等含义，虚拟语气所表示的含义不是客观存在的事实。
If I were you, I'd take them away.
如果我是你的话，我就会带走他们。
If I had met Li Hua, I could had told him.
如果我碰见了李华，我就告诉了他了。
If I had time. I could come to help you.
如果我有时间，我会来帮助你的。
He suggested that our class should be divided into five groups.
他建议说我们的班应该分成五个小组。
He speaks to us as if he had been there.
他给我们讲的好象他去过那儿。
虚拟语气的用法
1) 虚拟语气用在简单句中，表示祝愿，命令。
May you be happy.
祝你幸福。
May you have a good time.
祝愿你玩的痛快。
May the friendship between us last long.
祝愿我们的友情天长地久。
Have a good journey!
祝愿你旅途愉快！
You go out！
你出去！
2) 虚拟语气用在宾语从句中。动词 wish, suggest,order,insist, propose,等词后面的宾语从句表示的是一种虚拟语气， 宾语从句中的动词动作表示的只是一种愿望，要求。
I wish she would be on my side.
我希望她能站在我一边。
I wish I could help him.
我希望我能帮助他。
He insisted that all of us should be there on time by any means.
他坚持要我们大家想尽办法按时去那儿。
动词 demand, suggest, order, insist, propose 后面的从句中，"should" 可以省略。
The teacher suggested that we (should) clean the blackboard after class.
老师建议我们课后把黑板擦了。
He ordered that the students wash the clothes every week by themselves.
他要求学生每周都要自己洗衣服。
3) 虚拟语气用在主语从句中。
在句型 "It is important (necessary, strange, natural) 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.
我们有必要出去散散步。
It's natural that she should do so.
她这样做是很自然的。
It's important that we should take good care of the patient.
重要的是我们要照顾好病人。
4) 虚拟语气用在状语从句中。
虚拟语气最多地用在表示条件的状语从句和表示结果的主句中。在表示与事实相反的虚拟语气时，动词有三种时态形式，即现在，过去和将来。
与现在事实相反的：
条件从句 结果从句
If I (we,you,he,they)+ 动词过去式.. if I (he,she) were... I (we) should + 动词原形。 He (you,they) would + 动词原形。
与过去事实相反的：
条件从句 结果从句
If I(we,you,he,they)+ had + 过去分词 I(we)should + have+ 过去分词。He (you,they) would + have + 过去分词。
If I were you, I should buy it.
如果我是你，我就买了它。
If I had time, I would study French.
如果我有时间，我会学习法语的。
If she knew English,she would not ask me for help.
如果她懂英语的话，她不会找我帮忙的。
If you had got up earlier, you could have caught the train.
如果你早一点起床，就会赶上火车的。
If it were fine tomorrow,I would go shopping.
如果明天天气好，我就去买东西。
有关虚拟语气的几个问题：
1) 有时if引导的状语从句可以省略 if，而把从句中的动词 were, had 或 should 移到主语前面。
Were she younger, she would do it .
如果她年青点， 她就会干的。
Had he known her address, he would had gone to visite her.
如果他知道她的地址，他会去看她的。
2) 有时表示虚拟语气的条件从句或者主句都可以省略，而只剩下一个主句或者一个条件从句。
I could help you.
我本来可以帮助你。
If I had time.
我要有时间该多好啊。
She should have come to the party.
她应该来参加聚会。
If he had much more money.
如果他有更多的钱就能...。
3) 虚拟语气中，条件从句的动词动作可以和主句的动词动作时态不一致。
If they had studied hard, they could do it easily now.
如果他们以前努力学习的话，现在干的就会容易些。
If he had not taken my advice, he wouldn't do it much better like this.
如果他不听取我的建议，他就不会干得这样好。
⑦ 英语语法题 虚拟语气6
首先，请相信我，这个题目是错的（教辅书偶尔错几题也正常）。
正确的题目应该是：回
I should very much like to have gone to the party,but I______invited.
A.am not
B.haven't been
C.was not
D.will not be
本题是虚拟语气的答代表性试题，属于“前虚后实”模式，即前半句是虚拟，后半句是事实。
should/would like to have done sth.意为“本想做某事”，暗示过去想做而没有做。
由于这种句式表示“过去想”，所以but后的句子也应该是过去时态与之相配合，故答案是C。
⑧ 英语语法题（虚拟语气），求详解
当If 表虚拟语气时候，表示与过去事实相反：
If ... had done ..., ... would(might,could) have done...
从句谓语动词用had+done，主句用should/would/could/might+have+done结构。
所以这回个句子如果用if从句 的话，答应该是Tom might have come to school in time for the lecture if he had gotten up earlier.
might have done sth 表示本因该做某事而事实却没有做，也表示与现在事实相反。如果后面有but，则表转折，所以后面句子不用虚拟语气，而要用陈述语气，一般过去时。所以but he got up rather late也是对的。
这道题应该是个选择题，根本还是考察的虚拟语气，表示与过去事实相反：
If ... had done ..., ... would(might,could) have done...
但备选答案上没有if的正确答案，所以选择了陈述语气。
希望对你有帮助