Word · Frequency #321
required
需要；有必要
required is the past of require.
to need something or make something necessary
- 1.
To demand, to insist upon (having); to call for authoritatively.
要求,坚持拥有；以权威方式要求。
- 2.
Naturally to demand (something) as indispensable; to need, to call for as necessary.
自然地将某物视为必不可少而要求；需要,作为必要条件要求。
- 3.
To demand (of someone) to do something.
要求(某人)做某事。
要求；责令；要求；规定；坚持要求；要求,坚持拥有；以权威方式要求。；自然地将某物视为必不可少而要求；需要,作为必要条件要求。；要求(某人)做某事。
In use
This job requires a university degree and two years of experience.
The visa application requires you to submit your passport and a recent photo.
The teacher required that all students finish their homework before class.
require sth
This project requires a lot of time.
这个项目需要大量时间。
require sb to do sth
The teacher requires students to submit their homework on time.
老师要求学生按时提交作业。
require that sb (should) do sth
that从句常用虚拟语气，should可省略。
Connections
Collocations
- require that
- 要求（某人）做某事
- The regulations require that all employees wear safety gear.法规要求所有员工穿戴安全装备。
- require somebody to do something
- 要求某人做某事
- The teacher required the students to submit their essays by Friday.老师要求学生周五前提交论文。
- require doing something
- 需要被做（主动表被动）
- This plant requires watering every day.这种植物需要每天浇水。
- be required to do something
- 被要求做某事
- All passengers are required to show their boarding pass.所有乘客被要求出示登机牌。
Pop culture & quotes
- All that is required for the triumph of evil is for good men to do nothing.
- 邪恶获胜只需好人无所作为。
Learner notes
Memory Tip
re（再）+quire（问）→ 反复询问 → 需要；要求。
Context & Register
常见场景：正式文件、法律条款、工作说明、日常对话 require 多用于正式或中性语境，在日常对话中也常见，但语气比 need 正式。
Grammar Note
常用于正式语境，require sb of sth 为较正式用法。
Pronunciation & Spelling
Words ending in '-quire' (acquire, inquire) rhyme with 'require'. Words like 'fire', 'wire', 'tire', and 'desire' share the same final stressed vowel and following sounds, so they also rhyme. However, note that despite spelling similarities, 'require' and 'quite' do not rhyme because 'quite' has a different vowel sound (/kwaɪt/).
High-value vocabulary
该词属于 Oxford 核心词汇，值得优先掌握常见搭配和句型。
Usage priority
Collins 词频等级为 4，建议结合例句记忆，而不是只背中文释义。
Learn the forms together
页面下方列出了常见词形变化。学习时注意它们在句子中的语法位置。
Dictionary facts from ECDICT, WIKTIONARY.