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

have been doing sth have been done 与 having been done 与have been doing与having been doing有什么区别 have been doing ,have done和have doing区别 have been doing 神马意思? what you have been doing must have been doing与must have been done都表示推测,有什么区别呀? has been doing have been done区别 have been done 与 having been done 与have been doing与having been doing有什么区别请举例句说明 have been doing 为什么还有 have been deadj have been do和have been doing的不同 i has been doing 还是i have been doing have/has+been doing 与has/have+过去分词的区别 存在have been doing、have being doing、和have be doing吗? have been doing,had been doing,will have been down是什么 what have they been doing 是什么时态 have been doing sth是什么时态? have been doing 该怎么用 What have you been doing lately?