题目内容：

请问第二册第1课我觉设及过去进行时 A young man and a young woman were sitting behind me
请问第二册第1课我觉设及过去进行时 A
young man and a young woman were sitting behind
me用sat过去时间可以吗,可以吗,不管是否可以,请讲讲那些根据支持我们.如果可以,那意思会有哪些变化呢.多谢

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A young man and a young woman were sitting behind me.They were talking loudly.为什么用过去进行时? 2016-11-24