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I was reading the newspaper___I heard a loud shout outside

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I was reading the newspaper___I heard a loud shout outside
为什么是when 不是while 或者as呢?不用解释很难 初一水平就行 呵呵
I was reading the newspaper___I heard a loud shout outside
while是指两者同时发生,而when可以指两者同时发生也可以指先后发生!这里明显是heard过去,而was reading是正在进行!所以用when as引导让步状语从句,也可以引起句子倒装,你们没学,暂时可以不管它