I have been learning english for years,but I still can’t communicate with foreigners.

题目

I have been learning english for years,but I still can’t communicate with foreigners.
这里为什么要用have been learning啊?不能直接说I have learnt english for years

答案

have been doing,过去进行时,表状态一直在进行,这些年一直在学.have done sth,表动作已结束,学了几年就没学了.