She can sing a song.改成特殊疑问句 然后作出否定回答

What can she do?特殊疑问句
She can sing a song.肯定回答
Can she sing a song?一般疑问句
No,she can't.否定回答
what can't she do?特殊否定疑问句
She can's sing a song.否定回答