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虚拟语气在英语学习中作为一种修辞手法，经常用来表示说话人所说的话并不是事实，而是一种假设、愿望、怀疑或推测以及建议、主张等，也可以出现在用来表达喜、怒、哀、乐等情感浓厚的语句中。同时，在许多情况下，虚拟语气使说话人的语气显得委婉，能使说话人把自己的想法巧妙地表达出来。因此，在中学阶段让学生对虚拟语气有一定的掌握并达到运用的水平至关重要。
一、含有虚拟条件状语的虚拟句
1.条件表示与过去事实相反。
条件句中用过去完成时态，主句中用“情态动词（should、could、would、might）+动词不定式”的完成时态。
例如：If you had come here yesterday，you might have met the filmstar.
2.条件表示与现在事实相反。
条件句中用一般过去式 （系动词be用were），主句中用“should、could、would、might+ 动词原形”。
例如：If he lived here，he would help us out.
3.条件表示与将来事实相反。
条件句中通常用“A.过去式；B.should+动词原形；C. were to+动词原形”，主句中用“should、could、would、might+动词原形”。
例如：If I went home tonight，I would tell you about it.
二、虚拟语气的一些其它用法
1.当虚拟条件句的谓语动词含有were、should、had时，if可省略，而将were、should、had等词置于句首。
A.Had he learnt about computers， we would have hired him to work here.
B.Were I you，I wouldn’t do this like that. （If I were you，….）
2、虚拟条件句中，主、從句的动作所虚拟的时间不一致，这种情况称为“错综虚拟条件句”。
A.If I had worked hard at school，I would be an engineer now.
B.If I had taken your advice，I wouldn’t be here suffering from such hard work now.
C.If you had taken my advice，you wouldn’t be in hospital now.
3.as if引导的状语从句中动词用过去式或过去完成式。
A.They began to talk warmly as if they had known each other for long.
B.He often talks as if he were the hero himself.
4.demand、suggest、order、insist后接的从句中谓语动词用“should+动词原形”，should可以省略。通常能跟这样的宾语从句的动词还有command、desire、propose、request等。
A.He suggested that we not change our mind.
B.He suggested that the meeting （should） be put off.
5.wish后的从句中分别用过去式、过去完成式或者“should/would+动词原形”表示与现在、过去和将来情况相反。
I wish I could be a pop singer.
6.在“It is necessary/important/strange that…，It is suggested/demanded/ordered/requested that…”等从句中，谓语动词用“should+动词原形”， should可以省略。
It is strange that such a person should be our friends.
7.“It is （high）time that…”句型中动词用过去式或“should+动词原形”，should不可以省略。
It’s high time that we left.
8.有时，句子没有直接给出假设情况的条件，而须通过上下文或其他方式来判断，这种情况称为“含蓄虚拟条件句”，常见的判断词是“without，but for，but"。
But for his help，we would be working now.
9.Somebody would rather someone did something.
A.I would rather you went there.
B.I would rather he stayed at home and watched TV.
10.虚拟语气用于祝愿或诅咒语中。
在祝愿或诅咒语中没有人称变化的谓语动词或倒装形式。
A.God damn you！（活该！该死！）
B.God bless me！（愿上帝保佑我！）
C.May you be happy！（祝你快乐！）
总之，不论是在日常生活用语中还是在书面表达中，准确运用虚拟语气都可以达到画龙点睛的效果，希望对英语学习者能有所帮助。当然，“冰冻三尺，非一日之寒”，学习者不但要根据不同的句型去记忆不同的时态，还要学会在阅读时掌握文中信息，仔细分析上下文的逻辑关系，从而达到学以致用。
一、含有虚拟条件状语的虚拟句
1.条件表示与过去事实相反。
条件句中用过去完成时态，主句中用“情态动词（should、could、would、might）+动词不定式”的完成时态。
例如：If you had come here yesterday，you might have met the filmstar.
2.条件表示与现在事实相反。
条件句中用一般过去式 （系动词be用were），主句中用“should、could、would、might+ 动词原形”。
例如：If he lived here，he would help us out.
3.条件表示与将来事实相反。
条件句中通常用“A.过去式；B.should+动词原形；C. were to+动词原形”，主句中用“should、could、would、might+动词原形”。
例如：If I went home tonight，I would tell you about it.
二、虚拟语气的一些其它用法
1.当虚拟条件句的谓语动词含有were、should、had时，if可省略，而将were、should、had等词置于句首。
A.Had he learnt about computers， we would have hired him to work here.
B.Were I you，I wouldn’t do this like that. （If I were you，….）
2、虚拟条件句中，主、從句的动作所虚拟的时间不一致，这种情况称为“错综虚拟条件句”。
A.If I had worked hard at school，I would be an engineer now.
B.If I had taken your advice，I wouldn’t be here suffering from such hard work now.
C.If you had taken my advice，you wouldn’t be in hospital now.
3.as if引导的状语从句中动词用过去式或过去完成式。
A.They began to talk warmly as if they had known each other for long.
B.He often talks as if he were the hero himself.
4.demand、suggest、order、insist后接的从句中谓语动词用“should+动词原形”，should可以省略。通常能跟这样的宾语从句的动词还有command、desire、propose、request等。
A.He suggested that we not change our mind.
B.He suggested that the meeting （should） be put off.
5.wish后的从句中分别用过去式、过去完成式或者“should/would+动词原形”表示与现在、过去和将来情况相反。
I wish I could be a pop singer.
6.在“It is necessary/important/strange that…，It is suggested/demanded/ordered/requested that…”等从句中，谓语动词用“should+动词原形”， should可以省略。
It is strange that such a person should be our friends.
7.“It is （high）time that…”句型中动词用过去式或“should+动词原形”，should不可以省略。
It’s high time that we left.
8.有时，句子没有直接给出假设情况的条件，而须通过上下文或其他方式来判断，这种情况称为“含蓄虚拟条件句”，常见的判断词是“without，but for，but"。
But for his help，we would be working now.
9.Somebody would rather someone did something.
A.I would rather you went there.
B.I would rather he stayed at home and watched TV.
10.虚拟语气用于祝愿或诅咒语中。
在祝愿或诅咒语中没有人称变化的谓语动词或倒装形式。
A.God damn you！（活该！该死！）
B.God bless me！（愿上帝保佑我！）
C.May you be happy！（祝你快乐！）
总之，不论是在日常生活用语中还是在书面表达中，准确运用虚拟语气都可以达到画龙点睛的效果，希望对英语学习者能有所帮助。当然，“冰冻三尺，非一日之寒”，学习者不但要根据不同的句型去记忆不同的时态，还要学会在阅读时掌握文中信息，仔细分析上下文的逻辑关系，从而达到学以致用。