延长
To make something longer in space or time; to extend. Common in IELTS letters regarding visa extensions or deadlines.
Examples
3 of 5图书馆决定延长开放时间。
The library decided to extend its opening hours.
您可以申请延长签证的有效期。
You can apply to extend the validity of your visa.
能不能把截止日期延长一点？
Can the deadline be extended a little?
Word Family
Memory Tip
Yan (extend) + Chang (long) = Extending to make long.
Quick Quiz
因为工作没做完，他不得不____了加班时间。
Correct!
The correct answer is: 延长
Examples
图书馆决定延长开放时间。
everydayThe library decided to extend its opening hours.
您可以申请延长签证的有效期。
formalYou can apply to extend the validity of your visa.
能不能把截止日期延长一点？
informalCan the deadline be extended a little?
医疗技术的进步显著延长了人类的平均寿命。
academicAdvances in medical technology have significantly extended human average life expectancy.
公司计划延长保修期以吸引更多客户。
businessThe company plans to extend the warranty period to attract more customers.
Word Family
Common Collocations
Common Phrases
延长线
extension cord
延长至
extend until/to
延长赛
overtime (sports)
Often Confused With
延期 specifically means to delay the start or end time; 延长 can mean making the duration longer.
Usage Notes
Very useful for Task 1 letters asking for more time on a rental agreement or course.
Common Mistakes
Sometimes used when 'delay' (推迟) is more appropriate for a single point in time.
Memory Tip
Yan (extend) + Chang (long) = Extending to make long.
Word Origin
延 (to prolong) + 长 (long).
Grammar Patterns
Quick Quiz
因为工作没做完，他不得不____了加班时间。
Correct!
The correct answer is: 延长
Related Vocabulary
More business words
决策
B2The process of making important decisions, especially in a professional, political, or strategic context.
回复
B1To reply or respond to a message, letter, or inquiry. Essential for business correspondence and IELTS letter writing.
辞职
B1To voluntarily leave a job or office; to give up one's position.
顾客
B1A person or organization that buys goods or services from a store or business.
折扣
B1A reduction in the usual price of something; a discount.
报销
B1To apply for reimbursement of expenses incurred, typically for work-related purposes.
账户
B1A record of financial transactions for an individual or business, usually at a bank; or a user profile for a digital service.
审批
B1To examine and approve an application, document, or plan by an official or person in authority.
客户
B1A person or organization that buys goods or services from a store or business.
求职
B1To look for a job; the process of seeking employment.
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