1. to find out or learn something for certain
查明，弄清
The police are trying to ascertain the cause of the accident.
警方正試圖查明事故的原因。
We need to ascertain the facts before making a decision.
我們需要在做決定前弄清事實。
Ascertain Meaning（定義、用法、例句與發音）
ascertain
verb
快速理解
What does "Ascertain" mean?What are 2-3 core uses of "Ascertain"?
指透過調查或查證來確定事實或真相。
- 1
查明、確定
EN: to find out or learn something with certainty
翻譯: 透過調查或詢問來確切地得知某事。
- 2
證實、確認
EN: to make sure or verify a fact
翻譯: 透過檢查或證據來確認某事的真實性或正確性。
- 3
弄清、釐清
EN: to discover or establish the truth of a situation
翻譯: 透過系統性的探究來發現或建立對某種情況的真相。
小提醒：注意 'ascertain' 通常用於需要經過努力（如調查、研究）才能確定的情況，而非簡單地知道或相信。
發音（How to Pronounce "Ascertain" in English）
How to pronounce "Ascertain" in English?"Ascertain" US vs UK pronunciation
點擊下方的 US / UK 按鈕可播放發音。
Real-life Examples of "Ascertain" from YouTube Videos
Johanna Blakley: Social media and the end of gender
TED
“The future entertainment media that we're going to see is going to be very data-driven and it's going to be based on the information that we ascertain from taste communities online, where women are really driving the action.”
(1 out of 2)
Definitions（定義）
What are the definitions of "Ascertain"?How does "Ascertain" change by context?
2. to make sure or verify something
確認，證實
Please ascertain that all the doors are locked before you leave.
離開前請確認所有的門都已鎖好。
The doctor ascertained the patient's identity before the procedure.
醫生在手術前確認了病人的身份。
3. to discover through examination or investigation
經調查而發現
The researchers ascertained a link between diet and health.
研究人員經調查發現了飲食與健康之間的關聯。
It was difficult to ascertain his true intentions.
很難透過調查發現他的真實意圖。
Grammar & Patterns（句型）
What are common sentence patterns for "Ascertain"?How to make natural sentences with "Ascertain"?
| Pattern | Meaning | Example |
|---|---|---|
| ascertain + noun | 查明、確定（某事物） | The detective tried to ascertain the truth. (偵探試圖查明真相。) |
| ascertain + that-clause | 確定、證實（某事） | We must ascertain that the information is correct. (我們必須確定這資訊是正確的。) |
| ascertain + wh-clause (what, where, how, etc.) | 查明、弄清楚（某事） | The study aims to ascertain how the system works. (這項研究旨在弄清楚該系統如何運作。) |
| ascertain + whether/if-clause | 確定是否… | Please ascertain whether the meeting is still on. (請確定會議是否照常舉行。) |
| be ascertained + (prep. phrase) | 被查明、被確定 | The cause of the accident has not yet been ascertained. (事故的原因尚未查明。) |
用法說明
How is "Ascertain" different from similar structures?What usage mistakes are common with "Ascertain"?
ascertain + that 子句 vs ascertain + wh- 子句
- ascertain + that 子句 用於表達「確認一個已知或推斷的事實」。結構為
ascertain that + 主詞 + 動詞。 - ascertain + wh- 子句 用於表達「查明、弄清楚一個未知的細節或情況」。結構為
ascertain + what/where/when/how/whether/why + 子句。 - 兩者都相當正式，常見於書面報告、調查或法律文件中。
- 注意：
ascertain後面通常不直接接動名詞 (ascertain doing) 或不定詞 (ascertain to do)，而是接子句或名詞。 EN: The auditor must ascertain that all financial records are accurate. 翻譯: 審計員必須確認所有財務記錄都是準確的。
EN:The detective is trying to ascertain where the suspect was last night.
翻譯:偵探正試圖查明嫌疑人昨晚的行蹤。
總結建議
在正式場合中，若想表達「確認已知事實」用 ascertain that...，若想表達「查明未知資訊」則用 ascertain + wh-...。
易混淆對比
What is the difference between "Ascertain" and similar words?How to choose "Ascertain" vs alternatives?
ascertain vs determine
「ascertain」強調透過調查或詢問來「查明」一個已存在的事實或真相；「determine」則更廣泛，可指透過分析、計算或決心來「決定、判定」某事，包含決定未來行動或結果。
ascertain vs discover
「ascertain」是透過有意識、系統性的努力去「查明、確認」一個具體的資訊或事實；「discover」則是「發現」一個先前未知或未被注意的事物、地方或事實，可能帶有意外或驚喜的成分。
ascertain vs verify
「ascertain」是去「查明」一個未知的事實或真相；「verify」則是「驗證、核實」一個聲稱、說法或資料是否正確、真實或符合標準。
口語用法
How is "Ascertain" used in spoken English?What is the spoken vs formal difference for "Ascertain"?
引述
在口語中，常用來引述一個剛剛得知或確認的資訊，作為對話的起點。 EN: So I ascertained that the meeting is actually tomorrow, not today. 翻譯: 所以我確認了會議其實是明天，不是今天。
EN:I just ascertained from the website that the store closes at 8 PM.
翻譯:我剛從網站上確認，那家店晚上八點關門。
語氣強調
當想強調自己或他人「費了一番功夫才弄清楚」時使用，帶有「查明」、「弄個明白」的語氣。 EN: We need to ascertain exactly what went wrong before we proceed. 翻譯: 我們得先確實查明哪裡出了錯，才能繼續。
EN:He spent hours ascertaining the truth behind the rumor.
翻譯:他花了幾個小時去查明那個謠言背後的真相。
停頓填充
在較正式的對話或思考時，用作停頓填充詞，表示「讓我想想怎麼確認/弄清楚」。 EN: Let me ascertain... yes, I think we have enough budget for that. 翻譯: 讓我確認一下…對，我想我們的預算應該夠。
EN:The final cost? Well, I'd have to ascertain that with the finance team.
翻譯:最終成本？嗯，我得跟財務團隊確認一下才行。
正式書寫提醒：在非常正式或學術的書面報告中，ascertain 是合適的用詞。但在日常電子郵件或即時訊息中，使用 find out、check 或 confirm 會顯得更自然、更口語化。
常見短語
What common collocations use "Ascertain"?What fixed phrases with "Ascertain" should I remember?
ascertain the facts
ascertain the [noun]
查明事實
ascertain the truth
ascertain the [noun]
查明真相
ascertain the cause
ascertain the [noun]
確定原因
ascertain the extent
ascertain the [noun]
確定程度/範圍
ascertain whether
ascertain [wh-word clause]
確定是否
ascertain if
ascertain [if clause]
查明是否
ascertain the needs
ascertain the [plural noun]
確定需求
difficult to ascertain
[adj] to ascertain
難以確定
常見錯誤
What are common mistakes with "Ascertain"?Which "Ascertain" sentences look correct but are wrong?
×I will ascertain the truth of the report.
✓I will verify the truth of the report.
「ascertain」通常用於正式或調查情境，表示「查明、確定」事實或真相，而非一般性的「確認」或「核對」。在非正式或日常情境中，使用「verify」或「check」更為自然。
×I ascertained to find the answer.
✓I tried to ascertain the answer.
「ascertain」是及物動詞，後面直接接名詞或名詞子句作為受詞，表示「查明某事物」。它不能接不定詞（to + V）作為受詞。
×Can you ascertain if the meeting is tomorrow?
✓Can you find out if the meeting is tomorrow?
「ascertain」語氣正式，多用於書面或嚴肅的調查。詢問簡單的日常資訊時，使用「find out」或「check」更為恰當。
×I ascertained about the new policy.
✓I ascertained the details of the new policy.
「ascertain」是及物動詞，不能與介系詞「about」連用。應直接接上欲查明的具體事物作為受詞。
×We need to ascertain the problem.
✓We need to identify the problem.
「ascertain」強調透過調查或努力「查明」已存在但未知的事實或真相。對於初步「識別」或「發現」一個問題，使用「identify」或「determine」更為精確。
詞形變化
What are the word forms of "Ascertain"?What are tense/participle forms of "Ascertain"?
ascertains(3rd_singular)ascertaining(present_participle)ascertained(past)ascertained(past_participle)