摘要： (用过去进行时进行师生对话.引出the day before yesterday.) T: We have known what they were doing at about nine o’clock last night. What were you doing at about nine o’clock today, S1? S1: I was - T: Were you doing the dishes at about nine yesterday? do the dishes S1: Yes, I was./No, I was- T: What were you doing at the same time the day before yesterday? today, yesterday, the day before yesterday S1: I was - (画一时间轴.讲解the day before yesterday.) T: Today is Tuesday. (在Tuesday下面板书today.) today T: Monday? Ss: Yesterday. yesterday T: How about Sunday? Ss: The day before yesterday. the day before yesterday T: What were you doing this time the day before yesterday? Ss: We were -

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