别 / 不要 (bié / búyào): Don't! | Chinese (Mandarin) Grammar

Telling someone not to do something is where English speakers first stumble in Chinese, because the obvious guess — plain 不 (bù) plus the verb — is wrong. A command like don't leave! is not 不走; it needs a dedicated imperative negator: 别 (bié) or the fuller 不要 (búyào). This page shows how the two relate, why 不 can't do this job, and how a small final 了 flips 别 from don't start to stop!

别 and 不要: the negative command

The pattern is simple — (Subject) + 别 / 不要 + Verb:

别担心，一切都会好的。

bié dānxīn, yíqiè dōu huì hǎo de

Don't worry, everything will be fine. (informal)

你先别挂电话，我还有事跟你说。

nǐ xiān bié guà diànhuà, wǒ hái yǒu shì gēn nǐ shuō

Don't hang up yet — I still have something to tell you. (informal)

不要在这儿抽烟。

búyào zài zhèr chōuyān

Please don't smoke here. (neutral)

别 is simply the contraction of 不要 — same meaning, but 别 is shorter and far more common in speech. 不要 sounds a touch firmer or more explicit and is preferred in writing and on signs. Think of 别 as the everyday spoken default and 不要 as its slightly more emphatic twin.

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别 = 不要, both meaning "don't (do it)!". Reach for 别 when you talk, and don't over-think it — you almost never need the full 不要 in conversation.

Why not plain 不?

Here is the trap. English uses one word, don't, for two different jobs: a statement (I don't smoke) and a command (don't smoke!). Chinese splits these. Plain 不 + verb only ever makes a statement about the facts — won't / doesn't — never a command:

Chinese	Reading	Meaning	Type
他不走	tā bù zǒu	he won't leave / isn't leaving	statement
别走！	bié zǒu	don't leave!	command
不要走！	búyào zǒu	don't leave! (fuller)	command
请勿入内	qǐng wù rù nèi	no entry / do not enter	formal sign

So 他不哭 means "he doesn't cry / isn't crying," a description — whereas 别哭 means "don't cry!", the thing you actually say to a crying child. Keep the two mental slots separate: 不 describes, 别/不要 commands.

你可别忘了带钥匙。

nǐ kě bié wàng le dài yàoshi

Don't you forget to bring the keys. (informal — 可 adds insistence)

别…了: stop doing it!

When the action is already underway and you want it to stop, add a final 了: 别…了 = "stop (doing that) / that's enough already." Without 了, 别 tells someone not to start; with 了, it tells them to quit what they're doing right now:

别说了，我不想听。

bié shuō le, wǒ bù xiǎng tīng

Stop talking, I don't want to hear it. (informal)

别哭了，没事了。

bié kū le, méi shì le

Stop crying, it's okay now. (informal — comforting)

都几点了，别睡了，快起床！

dōu jǐ diǎn le, bié shuì le, kuài qǐchuáng

Look what time it is — stop sleeping, get up! (informal)

The contrast is worth feeling: 别说 = "don't say it" (don't start), 别说了 = "stop talking / drop it" (quit now). That little 了 carries the whole "already in progress" nuance that English marks with the word stop.

Register: politeness and signs

Prefix 请 (qǐng, "please") to soften a command into a polite request: 请别 / 请不要 (please don't). On formal signs and in written notices you'll meet 请勿 (qǐng wù) — a literary, written-only negator that never appears in casual speech:

请勿触摸展品。

qǐng wù chùmō zhǎnpǐn

Please do not touch the exhibits. (formal / written — museum sign)

天这么晚了，你别一个人回去。

tiān zhème wǎn le, nǐ bié yí ge rén huíqù

It's so late — don't go back on your own. (informal — caring advice)

One more boundary: to say there's no need to do something (rather than forbidding it), Chinese doesn't use 别 at all — it uses the no-need negation 不用 / 不必. "别谢" would be an odd command; the natural "you're welcome" is 不用谢. Keep forbidding (别) and releasing an obligation (不用) in separate boxes.

Common Mistakes

1. Using 不 for a command. Plain 不 + verb is a statement, not an order. To forbid, you must use 别 / 不要.

❌ 不哭！

Incorrect — 不哭 means 'doesn't cry', not a command.

✅ 别哭！

bié kū

Don't cry! (informal)

2. Turning a description into a command by accident. 你不担心 states "you don't worry"; the command needs 别 / 不要.

❌ 你不担心。

Incorrect as a command — this only states 'you don't worry'.

✅ 你别担心。

nǐ bié dānxīn

Don't worry. (informal)

3. Wrong word order — 别 must come before the verb. As an adverbial negator, 别 sits in front of the verb, never after it.

❌ 走别！

Incorrect — 别 precedes the verb; you can't stack it after.

✅ 别走！

bié zǒu

Don't go! (informal)

4. Forgetting 了 when you mean 'stop'. To make someone quit an ongoing action, the sentence needs the closing 了.

❌ 别吵，我在打电话。

Understandable but weaker — for 'stop being noisy (right now)' you want 别吵了.

✅ 别吵了，我在打电话。

bié chǎo le, wǒ zài dǎ diànhuà

Stop making noise, I'm on the phone. (informal)

Key Takeaways

Commands "don't…" use 别 (bié) or the fuller 不要 (búyào), never plain 不 — 别 is the contraction of 不要 and the everyday spoken choice.
Plain 不 + verb is a statement (不走 = "won't leave"), not a prohibition; keep "describe" and "command" in separate slots.
别…了 with a final 了 means "stop doing that / enough already," aimed at an action already underway.
请别 / 请不要 (polite) and 请勿 (formal, written signs) mark register; 请勿 never appears in casual speech.
For "no need to…," don't reach for 别 — use the separate no-need negation 不用 / 不必.

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