so 为何可以代替前面的形容词呢?
so在此为形容词,在系词be之后作表语,意为符合事实的,真的。词典解释和例句如下:
: agreeing with actual facts : true
You are saying things that are just not so.
I heard you met the president—is that so?
She thinks I'm angry at her, but that just isn't so. [=I'm not angry at her]