Bị presents its subject as undergoing an event or condition that is normally unwanted, harmful, inconvenient, or beyond the subject's control. It often translates an English passive—Tôi bị công ty sa thải “I was fired by the company”—but it is not a neutral passive auxiliary like English be. Its adversative viewpoint is part of the message.
That difference explains both where bị sounds natural and where it does not. Vietnamese can simply place an affected participant first, omit an unimportant agent, use an active clause, or choose favorable được. This page focuses on adverse bị; the favorable, permissive, and successful readings of được belong on Benefactive or Successful Được.
The main frames
| Frame | Interpretation | Example |
|---|---|---|
| affected participant + bị + event | agent omitted or irrelevant | Xe máy của tôi bị lấy mất. |
| affected participant + bị + agent + event | agent explicitly named | Tôi bị cảnh sát phạt. |
| subject + bị + state/condition | subject suffers a condition | Anh ấy bị thương. |
| subject + bị + mất + object | subject undergoes a loss | Tôi bị mất ví. |
Điện thoại của tôi bị rơi xuống nước sáng nay.
My phone fell into the water this morning, unfortunately.
Chị Lan bị khách hàng phàn nàn vì trả lời quá chậm.
Lan was complained about by a customer because she replied too slowly.
Chuyến tàu bị hủy do đường ray hư hỏng.
The train was canceled because the track was damaged.
The noun after bị in bị khách hàng phàn nàn is the agent of the following action. When there is no explicit agent, as in chuyến bay bị hủy, the affected participant remains prominent. Neither bị nor the following predicate changes for person or tense.
Bị contributes an adverse perspective
Compare a neutral event report with an adversative one:
Công ty sa thải ba nhân viên.
The company fired three employees.
Ba nhân viên bị công ty sa thải.
Three employees were fired by the company.
The active clause organizes the event around công ty. The bị clause organizes it around the employees and portrays what happened to them. This is a discourse and evaluation choice, not a transformation that Vietnamese grammar must apply whenever English uses a passive. The unfavorable evaluation is normally associated with the subject's experience, but it ultimately reflects the speaker's or discourse's viewpoint; bị does not literally assert that the subject personally objects to the event.
The adversity may be physical, social, practical, or merely contrary to plan.
Tôi bị kẹt xe nên đến muộn gần một giờ.
I got stuck in traffic, so I arrived almost an hour late.
Bọn trẻ bị bố mẹ bắt đi ngủ sớm.
The children were made by their parents to go to bed early.
Báo cáo bị gửi nhầm cho phòng khác.
The report was accidentally sent to the wrong department.
The final example is not disastrous, but the mistake inconveniences someone and violates expectations. That is enough to motivate bị.
Agent included, omitted, or expressed as a cause
Everyday Vietnamese usually omits an agent that is unknown or unimportant: Tôi bị lừa “I was deceived.” When the agent matters, the common colloquial order is subject + bị + agent + predicate.
Tôi bị người ta lấy mất mũ bảo hiểm.
Someone stole my helmet from me.
Here người ta is an indefinite human agent and mất after lấy reinforces the completed loss. That resultative use differs from mất as the loss predicate in Tôi bị mất ví. In formal writing, an agent can also be added with bởi, but a direct bị + agent + predicate or an active clause is often more natural than copying English by.
Do not confuse an agent with a cause phrase. Chuyến bay bị hủy do bão uses do bão “because of the storm”; the storm is the cause of cancellation, not necessarily an intentional canceling agent. Detailed choices with bởi and do are covered on Agent Phrases with Bởi and Do.
Event, state, and lexical combinations
After bị, Vietnamese may place an event predicate such as phạt “fine/punish,” mất “lose,” or hủy “cancel,” but it also has established combinations describing conditions: bị ốm “be ill,” bị thương “be injured,” bị đau đầu “have a headache,” bị lỗi “have an error/be faulty.” English may translate these with be, get, have, or a passive.
Máy này bị lỗi nên tôi không đăng nhập được.
This machine has an error, so I can't log in.
Anh ấy bị đau đầu từ sáng nhưng vẫn đi làm.
He has had a headache since this morning but still went to work.
These combinations are partly lexical and must be learned as natural frames. Do not assume that bị + any adjective or noun is possible. Plain Trời lạnh means “It is cold”; Trời bị lạnh is normally unnatural for ordinary weather because the sky/weather is not being construed as a sufferer.
Six basic predicate types under the bị test
| Baseline | What bị would do |
|---|---|
| Tôi ăn cơm. | Tôi bị bắt ăn cơm adds coercion: “I was forced to eat.” |
| Cô ấy là giáo viên. | identity is not a passive event; bare bị là giáo viên is wrong |
| Trời lạnh. | ordinary cold weather takes no là and no bị |
| Tôi có một câu hỏi. | bị does not mark ordinary possession |
| Ở đây có Wi-Fi. | existence is neutral; bị does not turn it into a passive |
| Tôi thấy lỗi đó. | Tôi bị phát hiện means “I was discovered,” with a different affected role |
Tôi bị bắt ăn cơm trước khi uống thuốc.
I was made to eat before taking the medicine.
This does not mean that cơm was eaten “by me.” The subject tôi suffers coercion, and bắt + ăn describes the imposed action. Similarly, Cô ấy là giáo viên uses là for classification, while Cô ấy bị hiểu lầm là giáo viên means “She was mistakenly taken for a teacher”: bị scopes over the adverse misidentification hiểu lầm, not over là alone.
Cô ấy bị hiểu lầm là giáo viên mới.
She was mistakenly taken for the new teacher.
Time, negation, and successful escape
Time expressions and viewpoint particles occur separately from the predicate. Đã bị presents the adverse event as realized; sẽ bị presents it as expected; chưa bị means it has not happened yet. Negating bị can deny that the event affected the subject.
Nếu đi vào đường này, anh sẽ bị phạt.
If you enter this road, you will be fined.
May mà chúng tôi không bị lạc.
Fortunately, we didn't get lost.
Successful được can occur later in the same clause without canceling the adversity: Tôi bị khóa tài khoản nhưng đã lấy lại được “My account was locked, but I managed to recover it.” Each marker contributes its own viewpoint.
In context
A: Sao hôm nay anh không đi làm? B: Tôi bị ngã trên đường đến công ty và điện thoại cũng bị vỡ. A: Anh có bị thương không? B: May là tôi chỉ bị đau tay. Tôi vẫn gọi cho sếp được bằng điện thoại của người khác.
A: Why aren't you going to work today? B: I fell on the way to the office, and my phone broke too. A: Were you injured? B: Fortunately, I only hurt my hand. I was still able to call my boss using someone else's phone.
The dialogue uses bị for three unwanted developments and a physical condition. Đến công ty keeps its ordinary destination frame; được after gọi marks successful ability. May là introduces a favorable evaluation, but là does not appear before đau tay, which is a predicate phrase.
Quick decision aid
- Is the subject affected by an unwanted or inconvenient event? Bị is likely.
- Is the event neutral and the agent important? Prefer an active clause.
- Is the outcome favorable or welcome? Consider được, not bị.
- Is the agent unknown or irrelevant? Omit it after bị.
- Is a human agent important in conversation? Bị + agent + predicate is common.
- Is the following word part of a lexical condition such as bị thương or bị đau đầu? Learn the combination as a unit.
- Is English merely using be + participle to describe a state? Do not insert bị automatically.
Common Mistakes
1. Using bị for every English passive.
❌ Tiếng Việt bị nói ở Việt Nam.
Unnatural calque of ‘Vietnamese is spoken in Vietnam’; no adversity is intended.
✅ Người Việt nói tiếng Việt.
Vietnamese people speak Vietnamese.
An active generic clause is natural because no affected sufferer needs foregrounding.
2. Adding là before a property or condition.
❌ Anh ấy bị là đau đầu.
Incorrect: là is not a universal copula.
✅ Anh ấy bị đau đầu.
He has a headache.
3. Inflecting the event predicate for past time.
❌ Hôm qua tôi bị phạt-đã.
Incorrect fused past marking.
✅ Hôm qua tôi bị phạt.
I was fined yesterday.
The time phrase supplies the past location; phạt remains invariant.
4. Copying English by with an ordinary colloquial agent.
❌ Tôi bị bởi người ta lừa.
Incorrect hybrid order: bởi cannot precede the direct agent inside this frame.
✅ Tôi bị người ta lừa.
Someone deceived me.
Bởi has valid formal uses, but the direct agent slot is more natural here.
5. Confusing adversity with ordinary location or existence.
❌ Ở đây bị có Wi-Fi yếu.
Incorrect attempt to make weak Wi-Fi an adversative passive.
✅ Ở đây có Wi-Fi nhưng sóng yếu.
There is Wi-Fi here, but the signal is weak.
Use the location-first existential frame, then predicate the problem naturally.
Key Takeaways
Bị is an affected-subject marker with an adverse or unwanted perspective, not a compulsory equivalent of English passive be. Its complement can include an event, an explicit agent plus event, or a conventional adverse condition. Vietnamese predicates remain uninflected, and discourse determines whether the agent is omitted, placed directly after bị, or expressed more formally. For favorable outcomes and successful attainment, choose được instead.
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