has been doing have been done区别

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）