I was in the classroom yesterday morning． 昨天早上我在教室里。
He was at school last Tuesday． 上周二他在学校。
They were over there a moment ago． 刚才他们在那边。
I was not (＝wasn't) here yesterday． 昨天我不在这儿。
My parents were not (＝weren't) at home last Sunday． 上周日我父母不在家。
Were you at home the day before yesterday﹖ 前天你在家吗？
Was she late this morning﹖ 今天早上她迟到了吗？
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