as 可作关系代词，引导定语从句。
1.as
as可以在限制性定语从句和非限制性定语从句中作主语或宾语。
① 在限制性定语从句中，as可跟在由suc， so， the same修饰的先行词之后。
Such men as heard him were deeply moved. 听过他说话的人，都会深受感动。(as在定语从句中作heard的主语)
Ive never heard such stories as he tells. 我从未听过像他讲的这样的故事。(as在定语从句中作tell的宾语)
He lifted so heavy a stone as no one else can lift. 他搬起别人都搬不起的大石头。(as在定语从句中lift的宾语)
比较：
在the same
