1. 此句正确。than/as用于比较时，从语法上来说视为连词，但是日常用法时却经常当做介词使用.这两种用法都是可以的。如：I‘m taller than he/him. I'm as tall as he/him.此从句than whom I have never seen a sillier man并非比较状语从句，而是非限制性定语从句。其中关系代词whom代指先行词John，将其代入从句中，为：(than whom) I have never seen a sillier man= I have never seen a sillier man (than whom)= I have never seen a si...
