This film is not so good as the one we saw last week.the one 可不可以改为that,为什么?

问题描述:

This film is not so good as the one we saw last week.the one 可不可以改为that,为什么?

我记得不可以,可以改成what为什么不行?the one不是等同于that吗?一方面它跟the film并列,另一方面还是saw 的宾语好像是这么解释,我都忘了,很久之前的东西了