As英文什麼意思

"As" 在英文中是一個多功能的詞,它可以作為連詞、介詞、副詞和助動詞使用。以下是一些常見的用法:

  1. 連詞(Conjunction):

    • 引導時間狀語從句,表示「當...時」或「隨著」:As I walked home, it started to rain.
    • 引導原因狀語從句,表示「因為」:As you are sick, you should stay home.
    • 引導方式狀語從句,表示「像...一樣」或「按照」:She spoke as if she knew everything.
    • 引導讓步狀語從句,表示「雖然」或「儘管」:Hard as it was, we managed to finish the task.
  2. 介詞(Preposition):

    • 表示方式或手段:She ran as fast as she could.
    • 表示比較的對象:She is as tall as her brother.
    • 表示時間:The meeting is scheduled for as early as possible.
  3. 副詞(Adverb):

    • 通常與動詞be連用,表示「同樣地」或「也」:She is as tall as her brother.
  4. 助動詞(Auxiliary Verb):

    • 用於構成進行時態:She is as busy as ever.
    • 用於構成完成時態:She has as much experience as him.

"As" 還有其他的一些用法,例如在短語 "as of" 中表示「從......起」,在 "as for" 中表示「關於」,以及在 "as to" 中表示「關於」或「至於」。

請注意,"as" 有時可以與 "like" 互換使用,但它們在某些情況下有細微的差別。例如,"as" 通常用於比較兩個事物,而 "like" 則更常用於表達相似性。