问题描述:
Have been doing与Have been +动词过去分词的区别
那么具体用法呢?该怎么区分呢?
例如:Have been leaning 与 Have been leaned的区分
那么具体用法呢?该怎么区分呢?
例如:Have been leaning 与 Have been leaned的区分
问题解答:
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