Christmas is Tom's favourite.这句话有什么错?

Christmas is Tom's favourite.这句话有什么错?
Christmas is Tom's favourite.这句话有什么错?

Christmas is Tom's favourite.这句话有什么错?
没什么错,如果在favorite 后面再加上一个festival 就更书面化.
两种都可以.

Christmas is Tom's favourite (festival).

是对的

Christmas is favourite of Tom's.

This is a right sentence.