2016年江西成考专升本英语考试复习笔记23

　　虚拟语气主要表示假想虚拟的情况以及主观愿望、建议、命令等。

　　（一）虚拟语气的基本用法

　　1、在含if引导的条件句的复合句中

　　如果假设的情况不可能发生或发生的可能性不大，则主句和从句的谓语都要用虚拟语气。虚拟语气在不同语态中的表现形式如下：

　　1）一般现在时

　　从句：过去式（be 动词多用were）

　　主句：would / could / might +动词原形

　　如：I would certainly go if I had time.

　　If it weren’t raining， we wouldn’t stay at home.

　　2）一般过去时

　　从句：had +过去分词

　　主句：would / could / might + have 过去分词

　　如：She would have come if she hadn’t been so busy.

　　You wouldn’t have caught cold if you had put on more clothes.

　　3）一般将来时

　　从句：过去时，或were to / should +动词原形

　　主句：would / should +动词原形

　　如：If I were to （should） do it， I would do it in a different way.

　　We wouldn’t lose courage if we should （were to） fail again.

　　有时从句表示的动作和主句表示的动作发生的时间不一致，谓语形式要根据具体的时间来调整。

　　If you had followed the doctor’s advice， you wouldn’t be in hospital now.

　　If I had spoken to him yesterday， I should know what to do now.

　　有时候假设的情况通过介词短语、上下文等来表示，这时句子仍然要用虚拟语气。

　　But for the storm， we should have arrived earlier.

　　I was ill th