关于pretty疑问

I would not be so fastidious as you are, cried Bingley, for a kingdom! Upon my honour I never met with so many pleasant girls in my life, as I have this evening; and there are several of them, you see, uncommonly pretty.

关于uncommonly pretty都是副词吗？假如把pretty理解为形容词，牛津词典查了，也不能做后置定语。

There are several of them, you see, uncommonly（副词修饰 pretty） pretty（形容词）.

you see 为插入成分。uncommonly pretty，为形容词词组作后置定语，修饰代词 several of them。形容词作后置定语是有条件的，比如，作非限制性定语时，形容词词组时，修饰代词时。单独一个 pretty 一般不会作后置定语的，修饰代词时作后置定语，你总不可以放在several 之前吧。本句，作后置定语的所有条件都已拥有，甚至一个条件就足够了。所以，网友不可以孤立考虑问题。