"I play the piano very well"怎么变为否定句?

"I play the piano very well"怎么变为否定句?
"I play the piano very well"怎么变为否定句?

"I play the piano very well"怎么变为否定句?
I can't play the piano very well.

I can not play the piano so well.

I play the piano not very well.
你加了the 是为什么呢?

楼上的，弹钢琴必须加the。
I can't play the piano very well.这个才是正确答案。