have been to to do和be doing

2019年3月25日 - have been doing,杨亮讲英文:怎么判断一个动词后面接to do还是doing?,轻松拿捏 have been / has been / had been,Have done和Had done的区别,一分钟看...

2016年5月8日 - to do强调去做,但还没做;to be doing强调正在做;to have done强调的是动作为完成时。 to do,to<