Would you be so good as to forward my letters to me

题目

Would you be so good as to forward my letters to me
这是句子里含有惯用型么,so ..as 是as...as句型么?如是的话,so应可换成as吗?这不是否定句为何要用so...as

答案

这里只是so……as to do sth这个短语的用法,“如此……以致”,短语搭配,固定用法,和as……as 没关系的,别搞混淆了,