1.辨别if 引导真实条件句和if引导的虚拟条件句的区别
If he has time, he will go with us.= Probably he has time and will go with us.
If he had time, he would go with us.=But in fact he has no time.
2.虚拟条件句中主句和从句的谓与动词构成形式如下表
|
if条件句中的谓与动词 |
主句的谓与动词 |
与现在的事实相反 |
1. 行为动词用did 形式 2. be动词用were |
should would could + 动词原形 might |
与过去的事实相反 |
had + done |
should would could + have + done might |
与将来的事实相反 |
1. 行为动词用did 2. should + 动词原形 3. were to + 动词原形 |
should would could + 动词原形 might |
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