Have/has been 后一定要加doing sth.吗?

Have/has been 后一定要加doing sth.吗? have been doing sth 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(has) been doing sth 造句写翻译 has been doing sth+介词 have been doing sth=have 直接加动词过去分词吗? have been doing sth和现在完成时有区别吗? has been doing have been done区别 have been doing sth是什么时态? i has been doing 还是i have been doing have /has been doing 是什么句型啊 have/has been doing否定形式