省略If的虛擬條件句的具體用法是怎樣的？

在條件句中可省略if，把were, 助動詞had, should提到句首，變?yōu)榈寡b句式。如：

If I were at school again, I would study harder．

→Were I at school again, I would study harder．

如果我還有上學(xué)的機(jī)會，我會更加努力地學(xué)習(xí)。

If you had come earlier，you would catch the bus．

→Had you come earlier, you would catch the bus．

如果你來得早些，你就能趕上公共汽車。

If I had enough money, I would help her.

→Had I enough money, I would help her. （x）

If it should rain tomorrow, we would not go climbing．

→Should it rain tomorrow, we would not go climbing．

如果明天下雨的話。我們就不去登山了。

If they were here, they should agree with me.

→Were they here, they should agree with me.

如果他們在這兒的話，他們會和我一個立場。

If he had learnt about driving, he should have had a car.→

Had he learnt about driving, he should have had a car.

如果他學(xué)了開車的話，他就有一輛自己的車了。

If?they?were?here?now,?they?could?help?us.→

Were?they?here?now,?they?could?help?us.

他們現(xiàn)在在的話，就會幫助我們了。