use as/serve as/act as/work as 的区别在哪里?

use as/serve as/act as/work as 的区别在哪里? work as\ act on\ serve as 表充当、担任, function as 和 work as 的区别 act as 比较as long as,as much as,as soon as,as well as的用法区别 serve as ,serve for有什么区别?是不是as修饰人的,for修饰物的 act on,act as,act act as 和act 作 扮演时的区别 act as 与act for的用法区别是啥 as...as与as if 的区别 as...as和so...as的区别 so..as和as..as的区别?