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...