1. to need something or make something necessary
需要；使成為必需
This job requires a lot of patience.
這份工作需要很大的耐心。
The recipe requires three eggs.
這個食譜需要三顆蛋。
Required Meaning（定義、用法、例句與發音）
required
verb
快速理解
What does "Required" mean?What are 2-3 core uses of "Required"?
「required」表示某事物是必要的、必須的，或根據規定必須完成的。
- 1
必要條件
EN: Necessary or needed as a condition.
翻譯: 作為條件是必要的或需要的。
- 2
強制規定
EN: Officially demanded or obligatory according to rules.
翻譯: 根據規定正式要求或強制性的。
- 3
必須完成
EN: Must be done or fulfilled.
翻譯: 必須被完成或滿足的。
小提醒：注意「required」是形容詞，描述狀態（被要求的），而非動作。要表達「要求（某人做某事）」的動作，應使用動詞「require」。
發音（How to Pronounce "Required" in English）
How to pronounce "Required" in English?"Required" US vs UK pronunciation
點擊下方的 US / UK 按鈕可播放發音。
Real-life Examples of "Required" from YouTube Videos
Steven Schwaitzberg: A universal translator for surgeons
TED
“Now the science behind this is so potent that it became required by the American Board of Surgery in order for a young surgeon to become board certified.”
(1 out of 52)
Definitions（定義）
What are the definitions of "Required"?How does "Required" change by context?
2. to officially demand that someone must do something, often by law or rule
（尤指依法或按規定）要求，命令
The law requires all drivers to have insurance.
法律要求所有駕駛都必須有保險。
Students are required to wear uniforms.
學生被要求穿制服。
3. to need a particular skill, quality, or condition in order to succeed
（為成功而）需要（某種技能、品質或條件）
This advanced course requires a good understanding of basic mathematics.
這門進階課程需要對基礎數學有良好的理解。
The delicate situation required careful handling.
這個微妙的局勢需要謹慎處理。
Grammar & Patterns（句型）
What are common sentence patterns for "Required"?How to make natural sentences with "Required"?
| Pattern | Meaning | Example |
|---|---|---|
| require + noun | 需要（某物） | The job requires patience. (這份工作需要耐心。) |
| require + that + clause | 要求（某事發生） | The law requires that all drivers have insurance. (法律要求所有駕駛都必須有保險。) |
| require + object + to + V | 要求（某人做某事） | The teacher required the students to submit their essays by Friday. (老師要求學生在週五前提交論文。) |
| be required to + V | 被要求（做某事） | Passengers are required to wear seat belts. (乘客被要求繫上安全帶。) |
| require + V-ing | 需要（被做） | This machine requires regular servicing. (這台機器需要定期保養。) |
| if required / as required | 如有需要 / 按要求 | Additional information will be provided if required. (如有需要，將提供額外資訊。) |
用法說明
How is "Required" different from similar structures?What usage mistakes are common with "Required"?
required doing vs required to do
- required doing 通常用於描述某種情況或規則「需要（某種行動或過程）」，強調的是行動本身或過程的必要性。
- required to do 則用於說明某人「被要求去做」某事，強調的是對特定對象（人或物）施加的義務或規定。
- 在正式或書面語中，required to do 更為常見，特別是指令或法律條文。
- 被動語態 be required to do 是表達「必須做」最標準的形式。 EN: The procedure required checking the patient's ID twice. 翻譯: 這個程序需要核對病人身分兩次。
EN:All visitors are required to wear a badge.
翻譯:所有訪客都必須佩戴識別證。
總結建議
在表達「必須」的義務時，最清晰且通用的說法是使用 be required to do。
易混淆對比
What is the difference between "Required" and similar words?How to choose "Required" vs alternatives?
required vs need
"required" 強調客觀規定或必要條件，語氣正式；"need" 則表達主觀需求或必要性，較為通用。
required vs mandatory
兩者皆表「強制性」，但 "mandatory" 語氣更強，常與法律或絕對義務相關。
required vs necessary
"required" 側重外部規定或標準；"necessary" 強調邏輯或情境上的必要性。
口語用法
How is "Required" used in spoken English?What is the spoken vs formal difference for "Required"?
引述
在口語中，常用來引述規則、要求或他人的話，語氣較為客觀。 EN: The form says a signature is required here. 翻譯: 表格上說這裡需要簽名。
EN:She said a doctor's note is required for an extension.
翻譯:她說要延期必須附上醫生證明。
語氣強調
與「really」、「absolutely」等副詞連用，強調必要性或強制性。 EN: A password is absolutely required to log in. 翻譯: 登入絕對需要密碼。
EN:Patience is really required for this job.
翻譯:做這份工作真的需要耐心。
停頓填充
在思考或解釋時，作為填充語，帶出後續的條件或要求。 EN: To join the trip, it's required... that you submit the form by Friday. 翻譯: 要參加這次旅行，必須… 你在週五前交表格。
EN:For the refund, what's required is... the original receipt.
翻譯:要退款，所需的是… 原始收據。
注意：在正式書寫中，應避免使用「it's required...」這類帶有停頓的口語結構，建議改用完整、直接的句子，例如「A submission of the form by Friday is required.」。
常見短語
What common collocations use "Required"?What fixed phrases with "Required" should I remember?
required for
be required for something
為某事所必需
required by
be required by law/regulation/contract
法律/法規/合約所要求
required to
be required to do something
被要求做某事
if required
if/when/as required
如有需要
required reading
required reading
指定讀物；必讀材料
required field
required field
必填欄位
legally required
legally required
法律規定
常見錯誤
What are common mistakes with "Required"?Which "Required" sentences look correct but are wrong?
×He is required to submit the report yesterday.
✓He was required to submit the report yesterday.
The verb 'required' must agree with the tense of the main clause. When referring to a past obligation, use the past tense 'was/were required'.
×It is required that he submits the form.
✓It is required that he submit the form.
After 'It is required that...', the subjunctive mood is used. The base form of the verb (submit) should follow, not the third-person singular form (submits).
×This job requires to have experience.
✓This job requires having experience. / This job requires experience.
The verb 'require' is not typically followed directly by an infinitive ('to have'). It can be followed by a noun/pronoun, a gerund ('having'), or a 'that'-clause.
×You are required for attending the orientation.
✓You are required to attend the orientation.
The correct pattern is 'be required to + base verb'. Using 'for + gerund' is incorrect in this context.
×A passport is required for entry to the country.
✓A passport is required for entry into the country.
While 'to' can be used with many verbs of motion, the standard collocation with 'entry' in this context is 'entry into' a place or country. 'Entry to' is sometimes used but 'into' is more precise for physical entry.
×Is it required? Yes, it requires.
✓Is it required? Yes, it is required.
'Require' is a transitive verb and needs an object. In short answers to questions with the passive voice ('is required'), you must repeat the auxiliary verb 'is' and the past participle 'required'.
詞形變化
What are the word forms of "Required"?What are tense/participle forms of "Required"?
requires(3rd_singular)requiring(present_participle)required(past)required(past_participle)