have been doing 和have+过去分词有什么不同?RT 比如have been collecting 和have collected的不同之处

HAV BEEN DOING STH为什么要加BEEN? have been doing ,have done和have doing区别 have been do和have been doing的不同 have been doing 和was doing的区别 存在have been doing、have being doing、和have be doing吗? have been doing sth have sb done和have been doing有么? have been doing 和have +动词过去分词的差别. have been doing have done 的用法和区别 have been doing have done 的用法和区别 what hav u been doing的been是干吗的?总觉得没必要. have been doing和have been done哪个是现在完成进行时啊? have been 后接形容词 和 have been doing 的区别 have been doing 神马意思? what you have been doing have been done和have been doing 和having been done和having done的区别.请举例, have been doing 和have+过去分词有什么不同?RT 比如have been collecting 和have collected的不同之处 has been doing have been done区别