He may have been reading.为什么有been又有 reading?

He may have been reading.为什么有been又有 reading?
He may have been reading.为什么有been又有 reading?

He may have been reading.为什么有been又有 reading?
have been reading是现在完成进行时,表示从过去开始,到现在还在进行的动作.
他也许一直在看书.

很简单，因为read在be后面，所以是be doing something