表语从句为何还要加what?有这么一个句子.what we forget is that hppiness is more than pleasure withou pain在我看来这里是一个表语从句,但为何句首要加what?按理说去掉what很通顺完全不影响表达啊?

问题描述:

表语从句为何还要加what?有这么一个句子.what we forget is that h
ppiness is more than pleasure withou pain
在我看来这里是一个表语从句,但为何句首要加what?按理说去掉what很通顺完全不影响表达啊?