act as 與act for的用法

　　1 . act as 擔任，充當，起的作用。如：

　　A trained dog can act as a guide to a blind person. 經過訓練的狗可以擔任盲人的向導。

　　表示擔任獨一無二的職務，其前通常不用冠詞。如：

　　He acted as manager in my absence. 我不在時他擔任經理。

　　I dont understand their language; youll have to act as

　　interpreter. 我不懂他們的語言，你得當翻譯了。

　　2 . act for 代理，代為。如：

　　Please act for me during my absence. 我不在時請代理我處理事務。

　　I acted for our captain while he was in hospital. 我們隊長住院時由我代理他。