i have been doing sth,and i +v（这里的动词要用过去分词吗）

i have been doing sth,and i +v（这里的动词要用过去分词吗） have been doing sth=have 直接加动词过去分词吗? 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. 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 我知道been 是be的过去分词 可是一般来说现在完成时是 have/has+动词过去分词（I have lived h 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 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 过去完成时可以have+动词过去分词,也可以have+been如I've lived here since 1987或I have i+过去分词 I have a hard time doing sth. 这句里的"doing sth"是什么成分?现在分词作time have 动词过去分词.和have been 过去分词的用法