常见的虚拟语气句型
一、虚拟语气用于非真实条件句中
1．与现在事实相反的虚拟语气形式
If ＋主语＋动词的过去式（be 要用were ）……, 主句主语＋would （或should, could, might）＋动词原形。
2． 与过去事实相反的虚拟语气形式
If ＋主语＋had ＋过去分词……, 主句主语＋would （或should, could, might ）＋have ＋过去分词。
3．与将来事实相反的虚拟语气形式
If ＋主语＋动词的过去式（或were to ＋动词原形, 或should ＋动词原形）……, 主句主语＋would （或should, could, might）＋动词原形。
二、虚拟语气的其它句型
1虚拟语气用在动词wish 带的宾语从句中, 宾语从句的谓语动词形式为:
①谓语动词用过去式（be 用were ）表示现在的情况。
例如: I wish I didn't have a cold. 但愿我没有感冒。
②谓语动词用过去完成式表示过去的情况。
例如: I wish I had seen you yesterday.
③谓语动词用would （或could, might）＋动词原形表示将来的情况。
例如: I wish you could come tomorrow. 但愿你明天会来。
注: as if（＝as though）引导的从句和if only后面所跟的句子也要用虚拟语气, 其形式和动词 wish 所带的宾语从句的形式相同。
例如: When a pencil is partly in a glass of water, it looks as if it were broken.
If only I had followed his advice. 若是我听了他的劝告就好了。
2用介词短语（without..., but for... ）、副词（otherwise ）表示某种假设的情况, 相当于if 引导的虚拟条件句。
例如: Without electricity human life would be quite different today.
3虚拟语气用在It ＋be ＋important （necessary, strange, natural ）＋that clause 句型中, that clause 的谓语动词应为“（should ＋）动词原形”。
例如: It is necessary that he be sent to the hospital at once.
4虚拟语气用在It ＋be ＋time ＋that clause句型中, that clause的谓语动词应为“动词的过去式（be 用were ）或should ＋动词原形”。
例如: It is time that he went（should go）to bed. 他睡觉的时间到了。
5. 虚拟语气用在order, ask, suggest（建议）, demand, request, insist（坚持要）等动词后面的宾语从句中, 宾语从句的谓语动词应为“（should ＋）动词原形”。
例如: He suggested that she start/ should start at once.
6. 虚拟语气用在advice, idea, order, plan, suggestion, demand, proposal等名词后面的表语从句或同位语从句中, 从句的谓语动词应为“（should ＋）动词原形”。
例如: My suggestion is that you should hold the meeting next Sunday.
The teacher gave orders that the work be finished / should be finished before 4 o'clock.
7. 虚拟语气用在It ＋be ＋suggested （ordered, demanded, requested... ）＋that clause句型中, that clause的谓语动词应为“（should ＋）动词原形”。
例如: It is suggested that we（should ）start the work at once. 有人建议我们立即开始工作。
8. 虚拟语气用在would rather 后面的从句中。用过去式（be 用were ）表示现在或将来的情况; 用过去完成式表示过去的情况。
例如: I would rather you went next Sunday. 我愿你下星期天去。
I would rather you hadn't done that. 我真希望你没做那件事。
常见的虚拟语气句型
一、虚拟语气用于非真实条件句中
1．与现在事实相反的虚拟语气形式
If ＋主语＋动词的过去式（be 要用were ）……, 主句主语＋would （或should, could, might）＋动词原形。
2． 与过去事实相反的虚拟语气形式
If ＋主语＋had ＋过去分词……, 主句主语＋would （或should, could, might ）＋have ＋过去分词。
3．与将来事实相反的虚拟语气形式
If ＋主语＋动词的过去式（或were to ＋动词原形, 或should ＋动词原形）……, 主句主语＋would （或should, could, might）＋动词原形。
二、虚拟语气的其它句型
1虚拟语气用在动词wish 带的宾语从句中, 宾语从句的谓语动词形式为:
①谓语动词用过去式（be 用were ）表示现在的情况。
例如: I wish I didn't have a cold. 但愿我没有感冒。
②谓语动词用过去完成式表示过去的情况。
例如: I wish I had seen you yesterday.
③谓语动词用would （或could, might）＋动词原形表示将来的情况。
例如: I wish you could come tomorrow. 但愿你明天会来。
注: as if（＝as though）引导的从句和if only后面所跟的句子也要用虚拟语气, 其形式和动词 wish 所带的宾语从句的形式相同。
例如: When a pencil is partly in a glass of water, it looks as if it were broken.
If only I had followed his advice. 若是我听了他的劝告就好了。
2用介词短语（without..., but for... ）、副词（otherwise ）表示某种假设的情况, 相当于if 引导的虚拟条件句。
例如: Without electricity human life would be quite different today.
3虚拟语气用在It ＋be ＋important （necessary, strange, natural ）＋that clause 句型中, that clause 的谓语动词应为“（should ＋）动词原形”。
例如: It is necessary that he be sent to the hospital at once.
4虚拟语气用在It ＋be ＋time ＋that clause句型中, that clause的谓语动词应为“动词的过去式（be 用were ）或should ＋动词原形”。
例如: It is time that he went（should go）to bed. 他睡觉的时间到了。
5. 虚拟语气用在order, ask, suggest（建议）, demand, request, insist（坚持要）等动词后面的宾语从句中, 宾语从句的谓语动词应为“（should ＋）动词原形”。
例如: He suggested that she start/ should start at once.
6. 虚拟语气用在advice, idea, order, plan, suggestion, demand, proposal等名词后面的表语从句或同位语从句中, 从句的谓语动词应为“（should ＋）动词原形”。
例如: My suggestion is that you should hold the meeting next Sunday.
The teacher gave orders that the work be finished / should be finished before 4 o'clock.
7. 虚拟语气用在It ＋be ＋suggested （ordered, demanded, requested... ）＋that clause句型中, that clause的谓语动词应为“（should ＋）动词原形”。
例如: It is suggested that we（should ）start the work at once. 有人建议我们立即开始工作。
8. 虚拟语气用在would rather 后面的从句中。用过去式（be 用were ）表示现在或将来的情况; 用过去完成式表示过去的情况。
例如: I would rather you went next Sunday. 我愿你下星期天去。
I would rather you hadn't done that. 我真希望你没做那件事。