1. completely sure about something
確定的，肯定的
I'm certain I locked the door before leaving.
我確定我離開前鎖了門。
Are you certain about the meeting time?
你對會議時間有把握嗎？
Certain Meaning（定義、用法、例句與發音）
certain
adjective
快速理解
What does "Certain" mean?What are 2-3 core uses of "Certain"?
「certain」主要表示確定的、特定的或某種程度的肯定。
- 1
確定的、肯定的
EN: I am certain that he will come.
翻譯: 我確定他會來。
- 2
特定的、某個
EN: A certain person called for you.
翻譯: 有某個人打電話找你。
- 3
某種程度的、一些
EN: There is a certain charm to this old town.
翻譯: 這座老城鎮有某種魅力。
- 4
必然的、無疑的
EN: Death is a certain event for everyone.
翻譯: 死亡對每個人來說都是必然的事。
小提醒：注意「certain」在「a certain + 名詞」結構中表示「某個」或「某種」，而非「確定的」。例如「a certain person」是「某個人」，不是「一個確定的人」。
發音（How to Pronounce "Certain" in English）
How to pronounce "Certain" in English?"Certain" US vs UK pronunciation
點擊下方的 US / UK 按鈕可播放發音。
Real-life Examples of "Certain" from YouTube Videos
Why is social media actually dumb.
meiqiii
“like that's what's crazy to me, because these videos are constantly being shown to me and like I just brainwashed to think of this certain way.”
(1 out of 187)
Definitions（定義）
What are the definitions of "Certain"?How does "Certain" change by context?
2. definite but not named or specified
某個，某些（未具體指明）
Certain people were invited to the private event.
某些人被邀請參加了這個私人活動。
There are certain rules you must follow.
有一些你必須遵守的規則。
3. guaranteed to happen or be true
必然的，確定的（指事情）
It's certain that prices will rise next year.
明年物價肯定會上漲。
His success seemed certain from the beginning.
他的成功從一開始似乎就是必然的。
4. of a particular quality or degree, but not extreme
一定程度的，某種的
She felt a certain amount of anxiety before the speech.
演講前她感到某種程度的焦慮。
There is a certain charm to this old town.
這個古鎮有某種魅力。
Grammar & Patterns（句型）
What are common sentence patterns for "Certain"?How to make natural sentences with "Certain"?
| Pattern | Meaning | Example |
|---|---|---|
| certain + noun | 確定的，某個 | We have certain rules that must be followed. (我們有某些必須遵守的規則。) |
| certain + that-clause | 確信，肯定 | I am certain that he will arrive on time. (我確信他會準時到達。) |
| certain + about/of + noun/gerund | 對…有把握 | She wasn't certain about the answer. (她對答案不太有把握。) |
| certain + to + verb | 一定會… | He is certain to win the competition. (他一定會贏得比賽。) |
| make certain + (that)-clause | 確保，弄清楚 | Please make certain that the door is locked. (請務必確認門已鎖好。) |
| a certain + noun (singular) | 某一個，特定的 | There is a certain charm to this old town. (這個古鎮有種特別的魅力。) |
| feel certain | 感到肯定 | I feel certain I've met him before. (我肯定我以前見過他。) |
用法說明
How is "Certain" different from similar structures?What usage mistakes are common with "Certain"?
certain of doing vs certain to do
- "certain of doing" 強調對自己正在進行或將要進行的某個動作有主觀的把握和信心，焦點在於內心的確信狀態。
- "certain to do" 則用於表達對未來事件結果的客觀預測或推斷，暗示根據現有情況，該結果幾乎必然發生。
- 主語為人時，兩者皆可用，但語意側重不同。主語為事物或事件時，通常使用 "certain to do" 來表示預期的結果。 EN: She is certain of winning the competition after all her practice. 翻譯: 經過所有練習後，她確信自己能贏得比賽。
EN:With her current skill level, she is certain to win the competition.
翻譯:以她目前的水準，她肯定會贏得比賽。
EN:He was certain of making the right choice.
翻譯:他確信自己做了正確的選擇。
EN:The new policy is certain to cause some controversy.
翻譯:這項新政策肯定會引起一些爭議。
總結建議
表達對自身行動的信心用 "certain of doing"，預測客觀必然結果則用 "certain to do"。
易混淆對比
What is the difference between "Certain" and similar words?How to choose "Certain" vs alternatives?
certain vs sure
「certain」和「sure」都表示「確定的」，但「certain」語氣更正式、更強烈，常用於書面或正式場合；「sure」則較口語化、隨意。
certain vs definite
「certain」強調主觀確信或無疑慮；「definite」強調客觀明確、具體或已確定的事實。
certain vs confident
「certain」指對事實或結果的確定；「confident」強調對自身能力或未來的信心。
口語用法
How is "Certain" used in spoken English?What is the spoken vs formal difference for "Certain"?
引述
在引述他人說法或一般認知時，用來表示「某個特定的」或「某種」，而非泛指全部。 EN: I heard from a certain someone that you're planning a trip. 翻譯: 我從某個人那裡聽說你正計劃一趟旅行。
EN:There's a certain charm to old-fashioned cafes that modern ones lack.
翻譯:老式咖啡館有一種現代咖啡館所缺乏的魅力。
語氣強調
用於強調說話者對某事的強烈感受或確信，常帶有主觀評價色彩。 EN: I have a certain feeling that this is going to be a great day. 翻譯: 我有種強烈的感覺，今天會是很棒的一天。
EN:She has a certain way of making everyone feel welcome.
翻譯:她確實有種能讓每個人都感到賓至如歸的本事。
停頓填充
在組織思緒或尋找合適詞語時，用作短暫的停頓填充詞，類似「嗯…那個…」。 EN: Well, I'm looking for a... certain... vibe in this room, you know? 翻譯: 嗯，我在尋找這個房間裡一種…那個…特定的氛圍，你懂吧？
EN:His reaction was, in a certain sense, understandable.
翻譯:他的反應，從某種意義上來說，是可以理解的。
正式寫作注意：在正式或學術寫作中，應避免將 "certain" 用作模糊的填充詞（如上述「停頓填充」的用法）。為求精確，應直接使用更明確的詞語，例如 "specific"、"particular" 或 "definite"。
常見短語
What common collocations use "Certain"?What fixed phrases with "Certain" should I remember?
certain of
be certain of something
對某事確信無疑
certain that
be certain (that)...
確信...
make certain
make certain (that)... / make certain of something
確保，查明
a certain extent
to a certain extent / degree
在某種程度上
certain amount
a certain amount / number / degree of something
一定數量的...；某種程度的...
for certain
know / say for certain
肯定地，確切地
in certain cases
in certain cases / circumstances
在某些情況下
a certain person/thing
a certain + noun
某個（不願或不必指名的人或事物）
常見錯誤
What are common mistakes with "Certain"?Which "Certain" sentences look correct but are wrong?
×I am certain for his success.
✓I am certain of his success.
形容詞 "certain" 後接事物時，應使用介系詞 "of" 或 "about"，而非 "for"。
×It is certain that he will comes.
✓It is certain that he will come.
在 "It is certain that..." 句型中，that 子句的動詞應使用原形，不因前面的 "will" 或 "would" 而改變。
×I want a certain book, but I don't know its title.
✓I want a particular book, but I don't know its title.
"certain" 表示「某個」時，通常指說話者心中已明確知道但未具體說出的人或物。若完全不確定（如不知道書名），應使用 "particular" 或 "specific" 更為精確。
×I am very certain that it's true.
✓I am absolutely certain that it's true.
"certain" 本身已表示高度確定，通常不用 "very" 修飾。若要加強語氣，應使用 "absolutely", "completely", "quite" 等副詞。
×He is certain to knows the answer.
✓He is certain to know the answer.
在 "be certain to + verb" 的結構中，動詞必須使用原形不定詞（base infinitive），不能加 "s" 或 "-ing"。
×I need to buy certain things from the supermarket.
✓I need to buy some things from the supermarket.
當泛指「一些」物品，且並無特指或隱含已知但未明說的對象時，使用 "some" 更為自然。"certain" 用於此處會顯得突兀且不自然。
詞形變化
What are the word forms of "Certain"?What are tense/participle forms of "Certain"?