as
翻译
作为, 如同, 因为, 当…时
例句
He works as a teacher.
他以教师为业。
She sings as beautifully as a bird.
她唱歌像鸟儿一样动听。
As it was raining, we stayed inside.
因为在下雨，我们待在室内。
He arrived as I was leaving.
我正要离开时他到了。
语法模式
as ((a/an + noun)) 作为，描述角色或功能 He works as a doctor.
as ((adjective/adverb)) as 和…一样…，用于比较 It's as cold as ice.
as ((clause)) 因为，给出原因 As it's late, I'll go home.
as ((clause)) 当…时，表示同时发生的动作 She smiled as he walked in.
近义词
同义词：like, because, when, while
词源
源自古英语“alswa”，意为“完全如此，正如”。
记忆技巧
“as”是一个有很多功能的小词：角色（as a...）、比较（as...as）、原因（as...）和时间（as...）。