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英语
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I was walking in the street when I heard someone shouting for help.中someone 后面为什么不加was啊?不是正在的意思么?
人气：317 ℃ 时间：2019-11-07 21:56:25
解答
hear sb doing sth 是听见某人正在进行的动作,例如类似的see sb doing sth.
如果加was 就变成 听说 一件事情了,即hear （that）
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