required
required — 形容詞
- requiredpositive
- more requiredcomparative
- most requiredsuperlative
1. needed or demanded by a rule, law, or official instruction — for example, a cour
必須的;規定的
因規則或法律而必須具備的
needed or demanded by a rule, law, or official instruction — for example, a course you must take, a document you must provide, or equipment you must have.
All students at this school must wear the required uniform every day.
這所學校的所有學生每天都必須穿規定的制服。
required + noun (uniform)
Mei submitted all the required documents for her visa application.
Mei 提交了簽證申請所需的所有文件。
The required safety training takes about two hours to complete.
必須的安全訓練課程大約需要兩小時才能完成。
subject pre-modifier: required + noun phrase
Passengers without the required travel documents cannot board the plane.
沒有所需旅行文件的乘客無法登機。
Dr. Okafor checked that all the required medicine was available at the clinic.
Dr. Okafor 確認了診所裡所有必須的藥品都備齊了。
required + noun (medicine) in a that-clause
- required reading
- required documents
- required courses
- required training
- required equipment
- required qualifications
- required skills
- required uniform
- mandatory
stronger and more formal; used for legal or official rules
- necessary
broader meaning — can refer to practical need, not just rules
- obligatory
formal; suggests a moral or social duty rather than a written rule
- compulsory
commonly used with courses, military service, or legal requirements
- optional
something you can choose to do or not do
- unnecessary
not needed for any reason
文法句型
required + noun
用法筆記
Frequently placed directly before a noun ('the required documents', 'required training'). Not normally used with degree intensifiers like 'very' — 'very required' sounds unnatural. Use 'strictly required' or 'absolutely required' instead to show strong necessity.
常見錯誤
同根字
- require動詞B1
- requirement名詞B1
- requisite形容詞C1
- prerequisite名詞C1