1. by chance; without planning or intention
偶然地；意外地；無意中
I accidentally bumped into an old friend at the supermarket.
我在超市偶然撞見了一位老朋友。
She accidentally deleted the important file.
她不小心刪除了那個重要的檔案。
Accidentally Meaning（定義、用法、例句與發音）
accidentally
adverb
快速理解
What does "Accidentally" mean?What are 2-3 core uses of "Accidentally"?
表示事情發生並非出於本意或計畫，而是偶然或意外地。
- 1
意外地
EN: by chance; without intention
翻譯: 指事情並非刻意安排，而是碰巧發生。
- 2
無意中
EN: unintentionally; not on purpose
翻譯: 指行為並非出於故意，而是不小心或未經思考所為。
- 3
偶然地
EN: in an unplanned or unforeseen manner
翻譯: 指事件或結果是偶然發生的，不在預期之內。
小提醒：注意與 'on purpose'（故意地）意思完全相反，使用時需確認語境是否為非自願或非計畫的情況。
發音（How to Pronounce "Accidentally" in English）
How to pronounce "Accidentally" in English?"Accidentally" US vs UK pronunciation
點擊下方的 US / UK 按鈕可播放發音。
Real-life Examples of "Accidentally" from YouTube Videos
Ellen Jorgensen: Biohacking -- you can do it, too
TED
“Well, working with the safe organisms that we normally work, with the chance of an accident happening, with somebody accidentally creating like some sort of superbug.”
(1 out of 12)
Definitions（定義）
What are the definitions of "Accidentally"?How does "Accidentally" change by context?
2. in a way that is not planned or expected, often causing damage or a problem
意外地（常導致損壞或問題）
He accidentally knocked over the vase.
他不小心打翻了花瓶。
The fire started when someone accidentally left the stove on.
火災是因有人不小心沒關爐火而引發的。
3. as a secondary or unintended result of an action
作為行動的次要或非預期結果
While researching the disease, they accidentally discovered a new treatment.
在研究這種疾病時，他們意外發現了一種新的療法。
The policy was meant to reduce traffic but accidentally increased pollution in residential areas.
該政策本意是減少交通流量，卻意外增加了住宅區的污染。
Grammar & Patterns（句型）
What are common sentence patterns for "Accidentally"?How to make natural sentences with "Accidentally"?
| Pattern | Meaning | Example |
|---|---|---|
| accidentally + V | 意外地、不小心地（做某事） | I accidentally deleted the important file. (我不小心刪除了那個重要檔案。) |
| accidentally + V-ing | 意外地、碰巧（正在做某事） | He walked in while I was accidentally reading his private messages. (他走進來時，我碰巧正在看他的私人訊息。) |
| be + accidentally + V-ed (past participle) | 被意外地（如何） | The power was accidentally cut off during the storm. (暴風雨期間電源被意外切斷了。) |
| accidentally + adverb of manner | 意外地以某種方式 | The ball flew accidentally straight through the open window. (球意外地筆直飛進了開著的窗戶。) |
| accidentally + on purpose (idiomatic) | 看似意外，實則故意 | She spilled coffee on his shirt accidentally on purpose. (她「不小心」把咖啡灑在他的襯衫上，其實是故意的。) |
用法說明
How is "Accidentally" different from similar structures?What usage mistakes are common with "Accidentally"?
accidentally doing vs accidentally to do
- accidentally doing 用於描述一個已經發生或正在發生的意外動作或事件。
- accidentally to do 在標準英語中是錯誤的結構，不應使用。正確的動詞不定式搭配是 accidentally + 動詞原形。
- 在情態動詞（如 would, might, could）或助動詞（如 did, will）之後，應使用 accidentally + 動詞原形。 EN: I accidentally deleted the important file. 翻譯: 我不小心刪除了那個重要檔案。
EN:I would accidentally delete files when I was tired.
翻譯:我疲憊時常會不小心刪除檔案。
總結建議
使用「accidentally + 動詞原形」來描述意外的動作，避免使用「accidentally to do」或「accidentally doing」來表示不定式。
易混淆對比
What is the difference between "Accidentally" and similar words?How to choose "Accidentally" vs alternatives?
accidentally vs intentionally
「accidentally」指無意中、意外地發生；「intentionally」則是有意地、故意地去做。
accidentally vs incidentally
「accidentally」強調意外或錯誤；「incidentally」則用於順帶一提或附帶發生的事。
accidentally vs unintentionally
「accidentally」與「unintentionally」都表示非故意，但「accidentally」更常指具體的意外事件。
口語用法
How is "Accidentally" used in spoken English?What is the spoken vs formal difference for "Accidentally"?
引述
用於引述自己或他人無意中說出的話或做出的行為，帶有解釋或辯解的語氣。 EN: I accidentally told him about the surprise party when we were chatting. 翻譯: 我們聊天時，我不小心把驚喜派對的事告訴他了。
EN:She was like, "Oops, I accidentally liked his photo from two years ago."
翻譯:她說：「哎呀，我不小心按讚了他兩年前的照片。」
語氣強調
在口語中，有時會將 "accidentally" 放在句首或加重語氣，以強調事件的意外性與戲劇效果。 EN: Accidentally, I deleted the entire folder. I was panicking! 翻譯: 不小心，我把整個資料夾刪了。我那時慌死了！
EN:I didn't mean to eavesdrop. I just accidentally overheard their whole argument.
翻譯:我不是故意偷聽。我只是不小心聽到了他們整個爭吵過程。
停頓填充
在描述事件時，作為一個停頓點，用來緩衝或鋪陳接下來要說的意外結果。 EN: So I was cleaning my phone, and... accidentally... I factory reset it. 翻譯: 就是我在清理手機，然後…不小心…把它恢復原廠設定了。
EN:He tried to help with cooking, but then he... accidentally... used salt instead of sugar.
翻譯:他本來想幫忙做飯，但後來他…不小心…把鹽當成糖用了。
正式寫作注意：在學術或正式商業寫作中，應避免使用 "accidentally" 來緩衝或戲劇化描述。建議使用更中性的詞語，如 "unintentionally"、"inadvertently"，或直接以客觀語句描述事件。
常見短語
What common collocations use "Accidentally"?What fixed phrases with "Accidentally" should I remember?
accidentally + verb
accidentally [past tense verb]
表示非故意地做了某個動作
accidentally on purpose
accidentally on purpose
表面上是意外，實際上是故意的；蓄意偽裝成意外
accidentally discover/find
accidentally discover/find [object]
偶然發現
accidentally hear/overhear
accidentally hear/overhear [something]
無意中聽到
accidentally bump into
accidentally bump into [person/object]
不小心撞到（人或物）
accidentally leave behind
accidentally leave [object] behind
不小心遺忘（某物）
accidentally send
accidentally send [message/email]
不小心傳送（訊息、郵件）
accidentally press/click
accidentally press/click [button/link]
不小心按到（按鈕）或點擊（連結）
常見錯誤
What are common mistakes with "Accidentally"?Which "Accidentally" sentences look correct but are wrong?
×I did it accidently.
✓I did it accidentally.
拼寫錯誤。正確拼法是 accidentally，結尾是 -ally，不是 -ly。
×I by accident dropped the glass.
✓I accidentally dropped the glass.
使用冗長或不自然的片語。在修飾動詞時，使用副詞 accidentally 比使用介系詞片語 by accident 更為簡潔自然。
×It was an accidentally event.
✓It was an accidental event.
詞性誤用。修飾名詞 (event) 時應使用形容詞 accidental，而非副詞 accidentally。
×I did it on accidentally.
✓I did it accidentally.
冗詞。Accidentally 本身已是副詞，前面不需要再加介系詞 on。
×He told me the secret accidental.
✓He told me the secret accidentally.
拼寫/詞性錯誤。修飾動詞 (told) 必須使用副詞 accidentally，而非形容詞 accidental。
詞形變化
What are the word forms of "Accidentally"?What are tense/participle forms of "Accidentally"?