1. in the role or function of
作為，以…的身份
He works as a teacher.
他擔任教師的工作。
I used the book as a reference.
我將那本書用作參考。
She is known as a talented artist.
她以才華洋溢的藝術家而聞名。
As Meaning（定義、用法、例句與發音）
as
preposition
快速理解
What does "As" mean?What are 2-3 core uses of "As"?
「as」是一個多功能介系詞，主要用於表示角色、功能、時間點或比較基準。
- 1
表示角色或功能
EN: She works as a teacher.
翻譯: 她以老師的身份工作。
- 2
表示時間點
EN: He arrived as the meeting started.
翻譯: 他在會議開始時抵達。
- 3
表示比較的基準
EN: This is not as difficult as it looks.
翻譯: 這沒有看起來那麼難。
- 4
表示原因
EN: As it was raining, we stayed home.
翻譯: 因為下雨，我們待在家裡。
小提醒：注意「as」表示原因時，語氣比「because」稍弱，且多用於句首。
發音（How to Pronounce "As" in English）
How to pronounce "As" in English?"As" US vs UK pronunciation
點擊下方的 US / UK 按鈕可播放發音。
Real-life Examples of "As" from YouTube Videos
South Korea would accept Trump-Kim deal to freeze North Korea’s nuclear programme | BBC News
BBC News
“It comes as South Korea's president Lie Jay Mung has told the BBC that he'd accept a deal with North Korea under which Pyongyang would freeze nuclear weapon production for now, rather than get rid of them altogether.”
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Definitions（定義）
What are the definitions of "As"?How does "As" change by context?
2. used to indicate a time or age
在…時候；當…時
As a child, I loved to read.
小時候，我很喜歡閱讀。
He started his career as a young man.
他年輕時就開始了他的職業生涯。
As the sun set, the sky turned orange.
太陽下山時，天空變成了橘色。
3. used to indicate similarity or equivalence
如同，像…一樣
She is dressed as a pirate for the party.
她打扮得像海盜一樣去參加派對。
The room was as cold as a refrigerator.
房間冷得像冰箱一樣。
He treats his employees as family.
他對待員工如同家人。
4. for the purpose of being
為了…的目的；當作
We bought the house as an investment.
我們買下這棟房子是為了投資。
She kept the letter as a souvenir.
她保留那封信當作紀念品。
He planted the tree as a memorial.
他種下那棵樹作為紀念。
5. used to indicate the way something is considered or described
被視為；被描述為
The plan was presented as a solution.
該計畫被提出作為一個解決方案。
He is regarded as an expert in his field.
他被視為其領域的專家。
The event was described as a great success.
這場活動被描述為一次巨大的成功。
Grammar & Patterns（句型）
What are common sentence patterns for "As"?How to make natural sentences with "As"?
| Pattern | Meaning | Example |
|---|---|---|
| as + noun (role/function) | 作為…；以…的身份 | He works as a teacher. (他作為一名老師工作。) |
| as + adjective/adverb + as | 和…一樣… | She is as tall as her brother. (她和她哥哥一樣高。) |
| as + clause (time) | 當…時；隨著 | As I was leaving, the phone rang. (當我要離開時，電話響了。) |
| as + clause (reason) | 因為；由於 | As it was raining, we stayed home. (因為下雨，我們待在家裡。) |
| as + clause (manner) | 按照…的方式；如同 | Do as I say. (照我說的做。) |
| as if / as though + clause | 好像；彷彿 | He looks as if he has seen a ghost. (他看起來好像見了鬼似的。) |
| regard/view/describe + noun + as + noun/adj | 將…視為/描述為… | I regard him as a friend. (我將他視為朋友。) |
| the same + noun + as | 和…相同的… | She has the same bag as mine. (她有一個和我一樣的包包。) |
| such + noun + as | 例如…；像…這樣的 | I enjoy outdoor activities such as hiking and cycling. (我喜歡戶外活動，例如健行和騎自行車。) |
| as for + noun/pronoun | 至於…；關於… | As for the details, we can discuss later. (至於細節，我們可以稍後討論。) |
用法說明
How is "As" different from similar structures?What usage mistakes are common with "As"?
as 與 like 的比較
- as 強調「作為…的身份或角色」，通常指真實的、正式的身份。
- like 則表示「像…一樣」，用於比喻或比較，並非指真實的身份。
- 在表示職業或功能時，as 更為精確；而 like 則帶有主觀感受或相似性的描述。
對比例句： EN: He works as a consultant for the company. 翻譯: 他在這家公司擔任顧問。
EN:He works like a consultant, giving advice but not officially hired.
翻譯:他工作起來像個顧問，提供建議但並非正式受僱。
EN:She spoke to me as a friend.
翻譯:她以朋友的身份和我談話。（強調她確實是朋友）
EN:She spoke to me like a friend.
翻譯:她像朋友一樣和我談話。（語氣或方式像朋友，但可能不是）
總結建議
在表達真實身份、職位或功能時使用 as；進行比喻或描述相似性時則使用 like。
易混淆對比
What is the difference between "As" and similar words?How to choose "As" vs alternatives?
as vs like
「as」強調「作為」某種身份或角色，或用於比較句；「like」則表示「像…一樣」，多用於比喻或描述相似性。
as vs while
「as」和「while」都可表示「當…時」，但「as」強調兩個動作同時發生且持續時間較短，「while」則強調在某一較長時段內發生。
as vs because
「as」和「because」都可表示原因，但「because」語氣更強、更直接；「as」語氣較弱，多用於已知或次要的原因。
口語用法
How is "As" used in spoken English?What is the spoken vs formal difference for "As"?
引述
在口語中，常用 "as" 來引述他人說過的話，相當於「就像...說的那樣」。 EN: As my dad always says, "Better safe than sorry." 翻譯: 就像我爸爸常說的：「安全總比後悔好。」
EN:As the weather report predicted, it started raining at noon.
翻譯:就像氣象預報說的那樣，中午開始下雨了。
語氣強調
用於強調兩個動作或狀態同時發生，帶有「正當...的時候」或「一邊...一邊...」的語氣。 EN: He walked in just as I was about to leave. 翻譯: 他走進來，正好是我要離開的時候。
EN:She sighed as she looked at the messy room.
翻譯:她一邊看著亂糟糟的房間，一邊嘆了口氣。
停頓填充
在思考或組織語句時，有時會用 "as" 作為短暫的停頓填充詞，類似「這個...」、「那個...」。 EN: It's, as... you know, not really my thing. 翻譯: 這，這個...你知道的，不是我的菜。
EN:The plan is, as... well, still up in the air.
翻譯:這個計畫，那個...嗯，還沒定案。
注意：以上口語用法在正式寫作（如學術論文、商業報告）中應避免使用，尤其是「停頓填充」的用法。正式文體應使用更精確、結構完整的連接詞與句式。
常見短語
What common collocations use "As"?What fixed phrases with "As" should I remember?
as...as
as + adjective/adverb + as
用於比較，表示「與...一樣...」
as if
as if + clause
好像，彷彿
as long as
as long as + clause
只要
as well as
X as well as Y
以及，和...一樣
as soon as
as soon as + clause
一...就...
as a result
as a result (of)
結果，因此
as for
as for + noun/pronoun
至於，關於
as though
as though + clause
好像，彷彿 (與 as if 同義)
常見錯誤
What are common mistakes with "As"?Which "As" sentences look correct but are wrong?
×He works like a teacher.
✓He works as a teacher.
使用 'as' 表示實際身分或職位，而 'like' 表示相似或比喻。當談論某人的職業或角色時，應使用 'as'。
×As it was raining, so we stayed home.
✓As it was raining, we stayed home.
'as' 在句首表示原因時，已經具有連接功能，後面不需要再加 'so'。這是中文「因為...所以...」結構的直譯錯誤。
×This book is same as that one.
✓This book is the same as that one.
在 'same as' 這個比較結構中，'same' 前面必須加上定冠詞 'the'。
×As I was cooking, the phone rang.
✓While I was cooking, the phone rang.
'as' 可以表示「當...時」，但通常強調兩個動作同時發生且持續時間較短。對於較長的背景動作，使用 'while' 更自然。不過在實際使用中，這個錯誤較輕微，兩者有時可互換。
×For instance Taipei, is a busy city.
✓Taipei, for instance, is a busy city.
使用 'for instance' 或 'for example' 舉例時，通常插入在句中或句尾，而不是句首直接接例子名稱。正確結構是「主詞 + , + for instance, + 敘述」或「For instance, + 完整句子」。
×He is here as to help you.
✓He is here to help you.
表示目的時，通常使用不定詞 'to + 動詞'，而不是 'as to + 動詞'。'as to' 通常用於引導話題或關於某事的討論，例如 'As to your question,...'。
詞形變化
What are the word forms of "As"?What are tense/participle forms of "As"?