19.10 表示"一…就…"的結(jié)構(gòu)
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　hardly/scarcely…when/before, no sooner…than　和as soon as都可以表示"一…就…"的意思，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.

　注意：如果hardly, scarcely 或no sooner置于句首，句子必須用倒裝結(jié)構(gòu)：
　Hardly / Scarcely had I got home when it began to rain.
　No sooner had I got home than it began to rain.