have been doing sth 和 have +过去分词 有什么不一样?看见since 之类的词 是应该用哪种形

have been doing sth 和 have +过去分词 有什么不一样?看见since 之类的词 是应该用哪种形 have been doing 和have+过去分词有什么不同? have been doing 和have +动词过去分词的差别. have been doing和 have +动词过去分词 的区别. have been doing sth had 加过去分词 have has 加过去分词 分别是什么时态?求什么区别?最 have有什么用法,诸如have doing sth 之类的 过去现在时 have /has been doing和have/ has +过去分词的区别 have+过去分词和have been+过去分词的区别 have+been+过去分词和have+过去分词有什么区别? have been+动词过去分词 和have+过去分词有什么不同? I have been busy since yesterday.现在完成时是have加过去分词,但这里的过去分词在哪里 have been +过去分词,和had been+过去分词,有什么区别?