英语虚拟语气
英语虚拟语气有：在虚拟语气的从句中，动词be的过去时态一律用were，不用was，即在从句中be用were代替。一般过去时should或者would+动词原形。例句：If they were here, they would help you。如果他们在那的话，那么他们是肯定会帮助你的。
1)在虚拟语气的从句中，动词'be'的过去时态一律用"were"，不用was， 即在从句中be用were代替。
If I were you, I would go to look for him.如果我是你，就会去找他。
2)用if you were me
What would you do if you were me?如果你是我，你会怎么做?
3）was主要用在It‘s time结构中，在该用was的时候不能用were
eg It’ time I was in bed。 我该上床睡觉了。（这里不能用were）
4）一些用法 ：
a.同现在事实相反的假设。
句型 ： 条件从句 主句
一般过去时should( would) +动词原形
If they were here, they would help you.
b.表示于过去事实相反的假设。
句型： 条件从句 主句
过去完成时should(would) have+过去分词
If she had worked harder, she would have succeeded.
c.表示对将来的假想
句型： 条件从句 主句
一般过去时should+动词原形
were+不定式would +动词原形
should+动词原形
If you succeeded, everything would be all right.
d It is (high) time that
It is (high) time that后面的从句谓语动词要用过去式或用should加动词原形，但should不可省略。
It is time that the children went to bed.
It is high time that the children should go to bed.
e It is demanded / necessary / a pity + that…结构中的主语从句的谓语动词要用should加动词原形，should可省略。
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