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英语
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the plane was late and detectives were waiting at the airport all moring这句话为什么用过去进行时
人气：437 ℃ 时间：2020-01-30 11:55:51
解答
表示过去的某一时间段正在进行的动作.
本句中是过去的一上午 （all morning）侦探们都在等候
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