as的用法歸納總結 as的用法有什麼

1、as做介詞,意思是“作爲” 例句: French is known as the most beautiful language in the world. 法語以世界上最美麗的語言著稱。

2、as做連詞,引導時間狀語從句,意思是“當……的時候” 例句: My mother was cooking fish as I arrived home. 當我到家的時候,我媽媽正在做魚。

3、as做連詞,引導原因狀語從句,意思是“因爲” 例句: As rain has fallen, the air is cooler. 因爲下過雨,所以空氣比較涼爽。