2011英语四级语法讲义大全：虚拟语气一

虚拟语气分三种情况来掌握：

1、虚拟条件句。

2、名词性虚拟语气。
3、虚拟语气的其他用语。

一、虚拟条件句：

条件状语从句是非真实情况，在这种情况下要用虚拟语气。

1、条件从句与现在事实不一致，其句型为：

If 主语＋过去时，主语＋should（could, would, 或might）＋动词原形，如：
If I were you, I would study hard.

If it rained, I would not be here now.

2、条件从句与过去事实不一致，句型为：

If 主语＋had＋过去分词，主语＋should（could, would, 或might）＋have＋过去分词，如：

If the doctor had come last night, the boy would have saved.

If I had not studied hard, I would have failed in the exam last term.

3、条件从句与将来事实不一致，句型为：

＋do，主语＋should（could…）＋ 原形 do
过去时（与现在事实条件句一样）。

If it should rain tomorrow, we would stay at home.

If I were to go to the moon one day, I could see it with my own eyes.

If you missed the film to night, you would feel sorry.