He used to play the piano.变为否定句对了还有一般疑问句used to的used是过去式么

He did not play the piano.
Was he used to play the piano?

he never play the piano

He used not to play the piano.
used to 不是use to的过去式
used to 是固定词组,表示过去常常
疑问句：
1、Did he use to play the piano?
2、Used he to play the piano?
l两个都行

He used not to play the piano