当had 代替 if时

在英语的 INVERSION（翻转）的文法中， 过去式的had 是可以用（IF）来代替的。

这个用had来代替（IF）的目的是（1）Formal Expression 正式的表达 （2）事情的可能性不大。

看看下列的句子。

1. If I had known the consequence , I would have checked it again.

Had I know the consequence, I would have checked it again.

2. If the authority had discovered it, these trouble makers would have been in trouble.

Had the authority discovered it, these trouble makers would have been in trouble.

3. If you had done the correct thing, this would not have happened.

Had you done the correct thing, this would not have happened.

4. If these convicts were to be hanged , there would be an outcry.

Were these convicts to be hanged, there would be an outcry.

5. If she has come late, she will have to be punished.

Has she come late, she will have to be punished.