who is the next?和who is next？这两句有语法问题吗？还是都对？

第一个正确，next通常是形容词，但是作为who的表语最好用代词或者名词形式。the next 特指 person or thing that is next

下一个人或事物。

例句：

The first episode was good. Now we have to wait a

week for the next. 头一集很好--下一集还得等一个星期.