1、以...的身份,作為充當角色、身份或功能的,如 act as。
2、以相似的方式,如同。
常見用法 as ..., so ... 正如(就像) ...., ...
as 帶領副詞子句,so 帶領的是主要子句,主詞和動詞可以倒置。
★ As plants needs sunshine and water, so do men need food.
植物需要陽光和水,正如人需要食物。
★ As a compass is to a ship, so is a target to a man.
目標之於人,猶如羅盤之於船。
★ As fire tries gold, so adversity tries virtue.
正如火煉金,逆境考驗美德。