Preposition: 为 (For / On Behalf Of)
介词：为
Use 为 to introduce the person or thing that benefits from an action
Place 为 before the beneficiary of an action to express "for" or "on behalf of." The subject does something for the benefit of the object introduced by 为.
为 (wèi) as a preposition means "for" — do not confuse it with 为 (wéi) meaning "to be" or "to act as." In the beneficiary sense, it is always pronounced wèi. It is more formal than 给 in the same role.
Lesson Targets
Podcast
Podcast: Preposition: 为 (For / On Behalf Of) (介词：为)
Listen to Jason & Amy explain the 介词：为 pattern
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Understanding 介词：为
The preposition 为 (wèi) introduces the beneficiary of an action — the person or group that an action is done for. When you say 妈妈为我们做饭, you are highlighting that Mom cooks specifically for our benefit. While 给 can also mean "for" in casual speech, 为 carries a stronger sense of dedication, sacrifice, or service. It suggests that the action is done with purpose and care. You will often see 为 used in contexts involving family devotion, professional service, and selfless actions. It is slightly more formal and literary than 给, making it common in written Chinese, speeches, and heartfelt statements about doing things for others.
Key Points
- 为 (wèi) = "for / on behalf of" — introduces the beneficiary of an action.
- More formal and heartfelt than 给 in the "for someone" sense.
- Pronounced wèi (4th tone) as a preposition, not wéi (2nd tone).
- Common in expressions of service and devotion: 为人民服务 (serve the people).
- Can introduce both people and abstract goals: 为他, 为国家, 为和平.
- Often appears with verbs of giving, doing, or creating: 为你做, 为他买, 为大家准备.
The phrase 为人民服务 (wèi rénmín fúwù — "serve the people") is one of the most famous slogans in modern Chinese history. Understanding 为 in this sense helps you grasp countless expressions about duty, sacrifice, and community service that permeate Chinese culture.
Key Vocabulary
Example Sentences
妈妈每天为我们做饭。
Mom cooks for us every day.
他为我买了一束花。
He bought a bouquet of flowers for me.
老师为学生们准备了很多练习。
The teacher prepared many exercises for the students.
她为这个家付出了很多。
She has given a lot for this family.
Expressing sacrifice and dedication
我为你感到骄傲。
I am proud of you.
Common expression of emotion
大家都在为考试做准备。
Everyone is preparing for the exam.
他为公司工作了二十年。
He has worked for the company for twenty years.
Common Mistakes
When expressing emotions "for" someone, you need the verb 感到 (to feel) between the 为 phrase and the adjective.
为了 expresses purpose ("in order to"), while 为 introduces a beneficiary ("for someone"). Buying flowers for a person uses 为, not 为了.
To describe the quality of what was made, use the 的 structure: 为我们做的饭 (the food made for us).
Practice Exercises
Tips & Tricks
Use 为 when you want to emphasize devotion or service — it sounds warmer and more selfless than 给.
Remember: 为 (wèi, 4th tone) = "for someone"; do not mix it up with 为 (wéi, 2nd tone) = "to be."
The expression 为你感到骄傲 (proud of you) is a beautiful phrase to learn — use it to encourage friends and family.
When in doubt between 为 and 给, 给 is safer in casual speech, but 为 adds a layer of respect and sincerity.
Homework
Write six sentences using 为: three about things family members do for each other, and three about what you do for your work, school, or community.