题目内容：

新目标英语九年级unit2短语和重点句型

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九年级英语Unit21. used to do sth. 过去常常做某事 否定形式： didn’t use to do sth. / used not to do sth.如：He used to play football after school. 放学后他过去常常踢足球. Did he use to play footba...