小学英语语法知识点：表示"一…就…"的结构

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小学英语语法知识点：表示"一…就…"的结构
        　　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.