he is not such a fool as he looks这句是什么从句?

问题描述:

he is not such a fool as he looks
这句是什么从句?

宾语从句

定语从句,as he looks修饰fool

什么也不是。
not such...as...
the same ...as...
固定用法
当然,as也可以引导定语从句

宾语从句阿!

as he looks是由as引导的定语从句,修饰a fool
这种情况很多,比如
I have the same book as he does.