每天学习英语语法：表示 一…就… 的结构

　　　hardly/scarcely…when/before, no sooner…than　跟as soon as都可能表示"一…就…"的意思，每天学习英语例：

　　　I had hardly / scarcely got home when it began to rain.
I had no sooner got home than it began to rain.
As soon as I got home, it began to rain.

　　　每天学习英语注意留心的地方：如果hardly, scarcely 或no sooner置于句首，句子必须用倒装结构：
Hardly / Scarcely had I got home when it began to rain.
No sooner had I got home than it began to rain.