have/has been doing否定形式是“They don't have been seeing each other these days.”是“They haven't been seeing each other these days.”Have you been learning English for ten years?是 No,I have't.还是 No,I don't.是 It is necessary of us

has been doing have been done区别 i has been doing 还是i have been doing Have/has been 后一定要加doing sth.吗? have /has been doing 是什么句型啊做题时遇到的 have(has) been doing sth 造句写翻译 had been doing是什么语法?举个例子~有have/has been doing的说法吗? They have been doing their homework能改成：he has been doing their homework 吗?have改成了has have/has+been doing 与has/have+过去分词的区别 过去现在时 have /has been doing和have/ has +过去分词的区别 have been doing sth have been doing 的用法,My borhter has worked in that factory since two years ago 问：不是have been doing吗,为什么会是has worked,余很笨, Have/Has been done 与Have/Has done 到底有什么区别啊最好简单一点 那 Have/Has been doing have been doing 神马意思? what you have been doing 现在完成时进行时“have/has been后是不是+doing? 现在分词是什么意思?过去分词又是什么? has been doing 的用法看到一句话：it has been a favorite magazine sinc i was a child.has been 后面接了名词,这是属于什么时态的用法呢?是have been doing have been doing ,have done和have doing区别 have /has been doing 是什么时态如题,它和have done 有什么区别吗?谢谢各位.（不太急）