as的六種用法

　　1、as做介詞，意思是“作為”

　　eg.French is known as the most beautiful language in the world.法語(yǔ)以世界上最美麗的語(yǔ)言著(zhù)稱(chēng)。

　　2、as做連詞，引導時(shí)間狀語(yǔ)從句，意思是“當……的時(shí)候”

　　eg.My mother was cooking fish as I arrived home.當我到家的時(shí)候，我媽媽正在做魚(yú)。

　　3、as做連詞，引導原因狀語(yǔ)從句，意思是“因為”

　　eg.As rain has fallen, the air is cooler. 因為下過(guò)雨，所以空氣比較涼爽。

　　4、as做連詞，引導讓步狀語(yǔ)從句，意思是“雖然”

　　eg.Young as he is, he has been one of the most famous painters in our country. 雖然他還很年輕，但已經(jīng)成為我們國家最有名的畫(huà)家之一。

　　5、as做連詞，引導方式狀語(yǔ)從句，意思是“以……方式”

　　eg.Do as the Romans do when in Rome. 入鄉隨俗

　　6、as做關(guān)系代詞，引導定語(yǔ)從句

　　eg.This is the same game as I played yesterday.這和我昨天玩的游戲一樣。