高中英语总复习语法清单：虚拟语气（习题版）高中英语
虚拟语气就记一句:
说"非事实"，动词要"退一步"。
1.if条件句:按时间退
①与现在相反:
if+过去式，主句would/could/might do.
If I were you, I would go.(我不是你)

②与过去相反:
if+had done,
主句would/could/might have done.
If I had known, I would have stayed.
(当时不知道)
③与将来相反:
if +should do /were to do,
主句would/could do。
If it should rain tomorrow..
(明天下雨可能性很小)
④混合时间:
从句和主句各退各的。
If you had studied harder, you would be in college now.
(过去没努力，所以现在上不了)

2.建议、要求、命令:用(should) do
常见词:suggest,demand, order, require, insist.
①从句一律用(should)+动词原形，should常省。
He suggested that we(should) leave early.
②主语从句也套这个:
It is important that he (should) be on time. ！
⚠️注意两个坑:
①insist表"坚持认为事实"不用虚拟:
He insisted tat he was right.
②suggest表"暗示"也不用虚拟:
His look suggested that he was angry.

3.wish:愿望难实现
①对现在:wish+过去式
I wish I were taller.
②对过去:wish+had done
I wish I had known.
③对将来:wish +would/could do
I wish it would stop raining.

4.其他固定句型
①as if / as though:
像但不是真的，用法同wish.
②It's (high) time:
该做某事了，从句用过去式。
It's high time we went home.
⑤would rather:
宁愿别人做，用过去式；
后悔过去用had done.
I'd rather you came tomorrow.

⑥if only:
要是.……就好了，规则同wish。

5.倒装:省略if
if里有were / had/ should,可省if并提前: Were I you...= If I were you..
Had I known...=If l had known...
记：考试里最稳的一条:
be动词过去式统一用were，不用was.