同学你好，该知识点来自沪江网校《2023考研VIP协议班【政治+英语二】》的课程，想要更系统的学习，欢迎进入课程学习。不仅可以和更多的同学一起学习，而且还有老师、助教随时的学习指导和知识点解答哦。

1、as做介词，意思是“作为”
例句:
French is known as the most beautiful language in the world.
法语以世界上最美丽的语言著称。
2、as做连词，引导时间状语从句，意思是“当.... 的时候”
例句: .
My mother was cooking fish as I arrived home.
当我到家的时候，我妈妈正在做鱼。
3、as做连词，引导原因状语从句,意思是“因为”
例句:
As rain has fallen, the air is cooler.
因为下过雨，所以空气比较凉爽。
4、as做连词，引导让步状语从句，意思是“虽然”
例句:
Young as he is, he has been one of the most famous painters in our country.
虽然他还很年轻，但已经成为我们国家最有名的画家之一。
5、as做连词，引导方式状语从句，意思是......方式
例句:
Do as the Romans do when in Rome.
入乡随俗
6、as做关系代词，引导定语从句
例句:
This is the same game as | played yesterday.
这和我昨天玩的游戏一样。