问题描述：
before three days和 three days before的区别 最好老师进
before three days 和 three days before我知道意义上应该没有什么区别,只是用在哪的问题,还有就是有一题He said that he had bought that bike( )这里是填那一个呢
before three days 和 three days before我知道意义上应该没有什么区别,只是用在哪的问题,还有就是有一题He said that he had bought that bike( )这里是填那一个呢
问题解答：
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