以下是小编为大家准备的英语语法虚拟语气在从句中的使用，本文共7篇，欢迎大家前来参阅。
篇1：英语语法虚拟语气在从句中的使用
一、虚拟语气用于定语从句中
在It is (high, about)time(that)…句型中，that引导的定语从句中的谓语常用一般过去时来构成虚拟语气。
例：It’s about time that we put an end to this controversy.
现在该是我们停止这场争论的时候了。
例：It is time we went to bed.
我们该去睡觉了。
二、虚拟语气用于if only 引导的从句中
在if only引导的从句中，谓语动词须采用虚拟语气，其用法与wish后宾语从句的用法基本相同，表示“但愿”，“要是…就好了”的意思。
例：If only I knew what you wanted.
要是我知道你需要什么就好了。
例：If only he had arrived in time,he would not have been punished.
他要是准时到达就好了。
经典练习：
1、It’s already six o’clock now. Don’t you think it’s about time____?
A)we are going home
B)we go home
C)we went home
D)we can go home
2、If only the committee____the regulations and put them into effect as soon as possible.
A)approve
B)will approve
C)can approve
D)would approve
3、It’s necessary____the dictionary immediately.
A)that he will return
B)that he returned
C)that he return
D)that he has to return
4、She must have had an accident, or he____then.
A)would have been here
B)had to be here
C)should be here
D)would be here
5、I apologize if I ____you, but I assure you it was unintentional.
A)offended
B)had offended
C)should have offended
D)might have offended
解析：
1、答案选C)。在it’s about time that…..句型中，定语从句的谓语动词应用过去时来表示虚拟语气。所以C项是正确的。
2、答案选D)。if only表示一种愿望，谓语用“would+动词原形”表示对将来事实的愿望，所以D是正确的。
3、答案选C)。在由it is necessary 等引导的主语从句要使用虚拟语气，虚拟语气的谓语动词用“should+动词原形”或动词原形。
4、答案选A)。由or引出的是与事实相反的假设条件，因此空缺处应填入表示虚拟语气的谓语动词。前一个分句中表示的是过去的时间，所以后一分句要用would have done的形式。所以A是正确的。
5、答案选B)。本题中but分句中的it was 表明事情发生在过去，因此条件句应用过去完成时，表示与过去事实相反，所以B是正确的。
篇2：考研英语 虚拟语气在从句中的运用
虚拟语气用来表示说话人的主观愿望或假想，而不表示客观存在的事实，所说的是一个条件，不一定是事实，或与事实相反。虚拟语气通过谓语动词的特殊形式来表示。在表示虚假的、与事实相反的或难以实现的情况时用虚拟语气， 表示主观愿望或某种强烈情感时，也用虚拟语气。即当一个人说话时欲强调其所说的话是基于自己的主观想法，愿望，假想，猜测，怀疑或建议，而不是根据客观实际，就用虚拟语气。
下面，专家们就为广大的的考生们详细地分析一下虚拟语气的三种用法，以供大家参考。
一、 虚拟语气在状语从句中的运用
虚拟语气在状语从句中的运用除了可以表示条件外，还可以表示比较、结果、目的等。虚拟语气用于表示条件的状语从句中，一般称为虚拟条件句。根据时间的不同，虚拟条件句中谓语动词时态的变化可能有三种形式，即现在、过去和将来。
If it did, it would open up its diversity program, now focused narrowly on race and gender, and look for reporters who differ broadly
by outlook, values, education, and class.( TEXT1)
这是一个含有条件状语从句的复合句。If it did是条件状语从句。主句中主语是it;谓语动词有两个，分别是would open up...和look for...。
这是一个与现在事实相反的虚拟语气，从句用一般过去时，主句用would+动词原形open up和look for。
参考译文：如果它能注意这个问题的话，它就会拓展其雇员多样化项目，而目前的项目只单纯考虑招收不同种族和性别的员工，去雇佣那些在世界观、价值观、教育背景及社会阶层方面各不相同的记者。
二、虚拟语气在名词性从句中的运用
虚拟语气除了用作状语从句中外，还可以用作主语从句、宾语从句、表语从句、同位语从句等名词性从中。
篇3：考研英语 虚拟语气在从句中的运用
当it作形式主语，后面用形容词作表语，即在it is + adj.这样的句型中，当描述主语的表语形容词是advisable，critical，crucial，desirable，essential，imperative，important，incredible，inevitable，necessary，recommend，strange，urgent等形容词时，主语从句的谓语动词多用虚拟语气，如果是现在时，谓语动词用should/would +动词原形(should/would经常省略);如果是过去时，则用should/would + have done的形式。
It was inevitable that this primacy should have narrowed as other countries grew richer. Just as inevitably，the retreat from predominance proved painful.
这是一个含有主语从句的`复合句。句首的It是形式主语，真正主语是that从句，该主语从句使用了虚拟语气should+完成时。( TEXT1)参考译文：随着其他国家日益富裕，美国的这一优势地位逐渐下降是不可避免的。惟其不可避免，从优势地位上退出愈发痛苦不堪。
篇4：考研英语 虚拟语气在从句中的运用
名词advice、assumption、decision、demand、desire、insistence、order、proposal、requirement、recommendation、suggestion……后面若有同位语从句，从句的谓语动词也应使用虚拟语气的形式。
Such behaviour is regarded as “all too human”，with the underlying assumption that other animals would not be capable of this finely developed sense of grievance. ( TEXT1)
这是个含有同位语从句的复合句。that引导的同位语从句的谓语动词由would+动词原形be构成。
参考译文：这样的行为被认为“完全是人类独有的特点”，其潜在的含义是其它动物没有这种敏锐的委屈感。
篇5：考研英语 虚拟语气在从句中的运用
与同位语从句一样，若主语是某些特定动词的同根名词(参考上一部分同位语从句)，要在它后面的表语从句要用虚拟式。
Another decision is whether the school should be one of the vast majority financed by the State or one of the very small but influential minority of private schools，though this choice is，of course，only available to the small number of those who can pay. (英语专业四级考试Text D)
这是个含有表语从句的复合句。主语是another decision;谓语是is;whether……or……是表语从句，其中谓语动词由should+动词原形be构成。参考译文：另一个要做出的决定是：应该选择一所占绝大多数的国立学校呢，还是选择一所数量虽小却有影响力的私立学校呢，当然，只有少数有支付能力的人才有这种选择的权利。
总之，虚拟语气是考研英语中的重要考点，频繁地出现在历年真题中。所以，的考生在平时备考中一定要认真复习，理解它在不同语境中的用法。
篇6：考研英语 虚拟语气在从句中的运用
表示“建议、请求、命令、要求”等主观意向的词(如：suggest、advise、assume、decide、demand、desire、insist、propose、order、recommend、require、suggest……)，引导宾语从句时需用虚拟语气。虚拟语气中的格式很固定：谓语动词用should+动词原形，should可以省略。注意这种句型中的虚拟语气形式不受主句动词时态的影响。Theories concerning on the individual suggest that children engage in criminal behavior because they were not sufficiently penalized for previous misdeeds or that they have learned criminal behavior through interactions with others.( CLOSE)
此句是个含有一个宾语从句、两个原因状语从句的复合句。suggest是主句谓语，Suggest后面的宾语从句中的谓语动词engage in前面省略了should.
参考译文：关于个体研究的理论认为，孩子们从事犯罪活动是因为以前他们做错事情时对他们的惩罚力度不够，或是因为他们通过与其他人的交往学会了犯罪。
篇7：中学英语语法虚拟语气
(一)并不是if引导的条件从句都是虚拟语气。如果if从句所指的事很有可能发生，那么这是真实条件句；反之，则是虚拟条件句
A. If you study hard, you'll surely pass the examination. (真实条件句)
B. If I were a bird, I could fly freely in the sky. (虚拟条件句)
(二)虚拟语气中，有时条件从句和主句的时态可以不一致，这种句子叫做混合条件句，也叫错综时间条件句。这种句子的形式要根据表示的时间来调整
A. If it had not been for me, you would not be free.
B. If you had spoken to him yesterday, you would know what to do now.
C. “If I had missed, ”said William Tell, “and had shot too low, I was going to use this arrow on you. ”
(三)有时虚拟条件不用条件从句，而用介词短语来表示
A. They would not be able to live without him.
B. He would have failed but for his teacher's timely advice.
C. I had my hair cut off and sold it because I couldn't have lived through Christmas without giving you a present.
D. If only you had worked with greater care!
(四)假设的情况有时可以通过上下文或其他方式表现出来
A. He would have given you more help, but he was so busy.
B. I was ill that day. Otherwise I would have taken part in the parade.
C. He raised himself completely, obliging me to rise too, or I could not have supported him.
D. Einstein cared little for money, though he could have been very rich.
(五)如果条件从句的谓语动词含有连系动词were或助动词had或should, 可将if省略，而把were, had或should移到主语之前，构成倒装句形式
If they were here now, they could help us. (自然语序)
A.
Were they here now, they could help us. (倒装句)
If you had come earlier, you would have met him. (自然语序)
B.
Had you come earlier, you would have met him. (倒装句)
If he should join them in their discussion, they would be happy. (自然语序)
C.
Should he join them in their discussion, they would be happy. (倒装句)
The ship would have sunk with all on board if it had not been for the captain. (自然语序)
D.
The ship would have sunk with all on board had it not been for the captain. (倒装句)
(六)虚拟语气的一些其他用法
(1)在动词wish后的宾语从句中谓语动词用过去式，表示现在或将来的愿望；用过去完成式，表示过去的愿望。
A. I wish I knew the answer.
B. I wish that the time had not passed so fast!
(2)would rather后的从句中也用以上的结构。
A. I would rather they came tomorrow.
B. I would rather you had gone there too.
(3)由as if或as though引导的状语从句，也用以上的结构。
A. She loves the child as if he were her own.
B. “How wild his white hair looked-as if it had been electrified. ”
(4)在suggest, order, demand, propose, command, request, insist等后面的宾语从句，谓语动词用should+ 动词原形(should可省略)。
A. They requested that he (should) go at once.
B. He ordered that all (should) take part in the work.
(5)与下列词有关的表语从句、同位语从句也用以上的结构。
suggestion(proposal), order(decision), request(demand), plan, idea, a shame, a pity, no wonder
A. My idea is that we (should) win him over.
(6)在It is important(necessary, strange, natural, wonderful)that后以及It is suggested(requested, proposed, arranged, desired, ordered, insisted)that后从句中亦用以上的结构。
A. It is necessary that everyone should be there in time.
B. It is suggested that she should sing a song.
(7)在It is (high/about) time that从句中，谓语动词用一般过去式表示将来。
A. It is time we went to bed.
B. It's about time you began your work.
(8)由in order that, so that引导的状语从句用may或might加动词原形，而so that引导的状语从句也可用can或could加动词原形
A. The emperor ordered that the weavers should be given some gold in order that they might begin their work at once.
B. The teacher spoke slowly so that the students could(might)hear clearly.
(七)suggest表示“建议，提议”时，用虚拟语气；作“认为，提出，暗示，使人想起”时，用陈述语气
A. I suggest he (should) bring his friends in. (虚拟语气)
B. On the boy's pale face there was a half smile that seemed to suggest that he was happy to have given his life for his country. (陈述语气)
C. I suggest that you had an ulterior motive in doing this(陈述语气)
(八)insist表示“坚持要”或“一定要(某人做某事)”时，用虚拟语气；作“坚持认为，坚决主张、坚持说(某人的观点)”时，用陈述语气
A. They insisted that he (should) obey the rules. (虚拟语气)
B. She insisted that she needed no help. (陈述语气)
C. He insists that Shanghai is the largest city in China. (陈述语气)
(九)should have done表示应该做的事没做；shouldn't have done表示不该做的事做了；need have done表示必须做的事没做；needn't have done表示不必做的事做了。这些也都是虚拟语气
A. “It's our own fault, ”I thought bitterly. “We should have cut away the jungle brush. ”
B. How I regretted the hours wasted in the woods and fields, the days when I had played and should have studied!
C. You needn't have spent so much time on the problem; it is not worth doing at all.
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