have been doing sth=have 直接加动词过去分词吗?
have been doing sth=have 直接加动词过去分词吗?
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 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 doing sth,and i +v(这里的动词要用过去分词吗)
have been 加动词的过去分词是什么时态
have been doing 和have+过去分词有什么不同?
什么时候用have been,什么时间have/has后面直接加过去分词?
have been doing sth
Have/has been 后一定要加doing sth.吗?
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 加动词的过去分词是什么意思