为什么不可以说as a clever student as,而可以说是as clever a student as

问题描述:

为什么不可以说as a clever student as,而可以说是as clever a student as

这里的as...as相当于so...as,前一个as做副词,后一个as做介词;另外和
such a clever student;
so clever a studen.有相同的用法.