题目内容：

Judy likes music very much.She likes music(that)she can dance to为什么不用what?

优质解答

定语从句,中心词是music,后面有dance to,而dance to the music是标准搭配,故这是一个定语从句,故用that不用what.
如果后面是这样“she can dance”,没加to,前面就要用to which,同样是定语从句,还是不能用what.希望你能看明白.