概念:表示现在在做什么,动作正在进行中; I am waiting for the train. My father is living in Xi'an now. The number of cars on the road is increasing. 概念:表示过去某时正在进行的动作; What were you doing at seven p.m. yesterday? Mary was listening to light music 10 minutes ago. I was washing my hair when you knocked at the door. 概念:强调在将来的某个具体时间正在发生的动作或事情; Don't call me between 10:00 and 10:30 tomorrow. I'll be having my class then. Please come tomorrow afternoon, I'll be having a meeting tomorrow morning. You won't miss her. She will be wearing a white T-shirt and a black skirt at that time. 概念:表示就过去某一时间而言,将来某一时刻或某一段时间正在进行的动作; I never realized that some day I would be living in China. He asked me what I would be doing at six o'clock tomorrow. He said that he could not come because he would be having a meeting. |
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