have been doing 和was doing的区别

have been doing 和was doing的区别 will have been doing和have been doing的区别 have been doing ,have done和have doing区别 have been doing have done 的用法和区别 have been doing和 have +动词过去分词 的区别. to having been doing 和having been doing 的区别 be always doing与have always been doing的区别 be said to be doing和be said to have been doing的区别 Will have been doing 和 will be doing 的区别,要求详解. to have been doing 和 having been doing 有什么区别,重点是have 和having have been 后接形容词 和 have been doing 的区别 was doing、had been doing和had been done都有什么区别?