Mandarin has exactly two everyday negators, and choosing between them is one of the first real grammar decisions a learner makes. 不 (bù) negates the general, habitual, willed, or future — plus all adjectives and modal verbs. 没(有) (méi yǒu) negates the verb 有 ("to have / there is") and any completed or experienced action. Compare 我不喝咖啡 "I don't drink coffee (as a rule)" with 我没喝咖啡 "I didn't drink the coffee," or 我不高 "I'm not tall" with 我没有钱 "I have no money." The reframing English speakers need most: the split is not about tense. English marks when on the verb (don't / didn't); Chinese instead splits by the nature of the negation — is it a habit, quality, or plan (不), or a completed event or existence (没)? Get this one contrast and the whole Negation group opens up.
The fundamental split
Line the two negators up by what they negate. 不 lives in the world of the general, the intended, and the qualitative — things not (yet) framed as finished events. 没 lives in the world of the completed and the existent — something that did or didn't happen, something you do or don't have.
| Negator | Negates | Time / aspect feel | Example |
|---|---|---|---|
| 不 (bù) | habits, intentions, future, willingness, adjectives, modal verbs | general / not-yet-realised (未然) | 我不去 (I'm not going / won't go) |
| 没(有) (méi) | completed actions, past events, existence (有), change of state | already realised / did-not-happen (已然) | 我没去 (I didn't go) |
我不喝咖啡。
wǒ bù hē kāfēi
I don't drink coffee. (neutral) — a habit, a general rule about me: 不.
我没喝咖啡。
wǒ méi hē kāfēi
I didn't drink the coffee. (neutral) — a specific completed non-event: 没.
他明天不来。
tā míngtiān bù lái
He's not coming tomorrow. (neutral) — future / intention, so 不.
他昨天没来。
tā zuótiān méi lái
He didn't come yesterday. (neutral) — a completed non-event, so 没.
不: the general negator
不 is the default. It covers habits, intentions and the future, willingness and refusals, all adjectives, and all modal verbs (会, 能, 想, 要). Because adjectives are themselves verbs in Chinese, 不 attaches straight to them with no 是.
我不高。
wǒ bù gāo
I'm not tall. (neutral) — a quality/state; adjectives always take 不, no 是.
这个电影不好看。
zhège diànyǐng bù hǎokàn
This movie isn't good. (informal) — evaluating a quality: 不好看.
我不想去。
wǒ bù xiǎng qù
I don't want to go. (informal) — 想 is a modal of volition, so 不.
The full range of 不 — habits, states, modals, the copula 是 — is laid out on the 不 basics page.
没: completion and existence
没(有) does two jobs. First, it is the only negation of the verb 有 ("to have / there is") — 不有 does not exist. Second, it negates a completed or experienced action: the event did not take place, or has not taken place yet.
我没有钱。
wǒ méiyǒu qián
I have no money. (neutral) — 有 negates only with 没; 不有 is impossible.
我还没吃饭。
wǒ hái méi chī fàn
I haven't eaten yet. (informal) — a not-yet-completed action: 还没.
你怎么没告诉我？
nǐ zěnme méi gàosu wǒ
How come you didn't tell me? (informal) — negating a completed action: 没告诉.
Notice that 没 kills the completion marker 了: you say 我没吃 (not 我没吃了) — the event simply didn't happen, so there's nothing completed to mark. That interaction is covered on the completed-action negation page.
The minimal pairs that make it click
The sharpest way to feel the split is to negate the same verb both ways and watch the meaning shift from "as a rule / by choice" to "didn't happen."
| With 不 | With 没 |
|---|---|
| 我不吃肉 (I don't eat meat — habit) | 我没吃肉 (I didn't eat the meat — this time) |
| 他不来 (he won't come — intention) | 他没来 (he didn't come — fact) |
| 我不喝酒 (I don't drink — general) | 我没喝酒 (I didn't drink — that occasion) |
我不吃肉，我是素食主义者。
wǒ bù chī ròu, wǒ shì sùshí zhǔyì zhě
I don't eat meat — I'm a vegetarian. (neutral) — a standing habit, so 不.
今天的肉我没吃，太咸了。
jīntiān de ròu wǒ méi chī, tài xián le
I didn't eat today's meat — it was too salty. (informal) — a specific completed non-event, so 没.
Common Mistakes
1. Using 不 for a completed action. A finished, past event that didn't happen takes 没, not 不.
❌ 昨天我不去。
Incorrect — a completed past non-event needs 没: 昨天我没去.
✅ 昨天我没去。
zuótiān wǒ méi qù
I didn't go yesterday. — 没 for the completed non-event.
2. Saying 不有. The verb 有 negates only with 没. 不有 does not exist.
❌ 我不有时间。
Incorrect — 有 never takes 不; use 没有.
✅ 我没有时间。
wǒ méiyǒu shíjiān
I don't have time. — 没有 is the only negation of 有.
3. Using 没 for an adjective or a quality. Qualities and states take 不; 没 only works for adjectives when you mean a change hasn't happened.
❌ 我没高兴。
Incorrect — a state/quality takes 不: 我不高兴.
✅ 我不高兴。
wǒ bù gāoxìng
I'm not happy. — states negate with 不.
4. Using 没 for the future or an intention. A plan you won't carry out is 不, not 没 (没 would say it already didn't happen).
❌ 我明天没去。
Incorrect — future intention takes 不: 我明天不去.
✅ 我明天不去。
wǒ míngtiān bú qù
I'm not going tomorrow. — future/intention, so 不.
Key Takeaways
- Mandarin has two negators: 不 (bù) for the general/habitual/willed/future, all adjectives, and all modals; 没(有) (méi) for the verb 有 and completed/experienced actions.
- The split is not tense — it's habit/intention/quality (不) vs completion/existence (没).
- The verb 有 negates only with 没有 — never 不有.
- 没 cancels 了: 我没吃, not 我没吃了.
- Litmus test: "has it happened yet?" → 没 for a finished non-event, 不 for everything general or intended.
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- 不 (bù): The General NegatorHSK 1 — 不 (bù) is the default negator — for habits, intentions and the future, states and adjectives, willingness, and modal verbs. It sits directly before the word it negates: 我不吃肉, 他不高, 我不会游泳, 我明天不去. Adjectives negate with 不 and take no 是; only completed actions and 有 switch to 没.
- 没(有) (méi yǒu): Negating 有 and Completed ActionHSK 1 — 没(有) does two jobs: it is the only way to negate 有 (有 is never 不有), and it negates completed or experienced actions — 我没吃 'I didn't eat', dropping the 了. Think of 没 as the completion/existence/change negator.
- 不 or 没? Habitual vs Completed ActionHSK 2 — The make-or-break negation choice: 不 negates a habit, intention, or quality (我不喝酒 'I don't drink'), while 没 negates a specific event that failed to happen (我没喝酒 'I didn't drink [that time]'). Sort by meaning, not by English 'don't' vs 'didn't'.