How to Say No in Chinese (不, bù, 没有, 别)

The dictionary gloss for 不 is "not", and that gloss is accurate but incomplete. 不 is a negative adverb that attaches to a verb or an adjective the way "not" does in "not go" or "not good". It is not a free-standing answer word the way English "no" is, and it cannot stand in for a whole clause on its own.

You can say a single 不 as an answer, and people do — in a sharp exchange, to a child, or when the situation is urgent. But it lands hard, like answering "No." with a full stop and nothing after it. In ordinary conversation Mandarin refuses by negating the relevant verb: 不去 (bú qù, "not going"), 不要 (bú yào, "do not want"), 没有 (méiyǒu, "do not have"), 不行 (bù xíng, "will not work").

不 has one underlying tone: fourth tone, bù. Spoken Mandarin changes it in one specific environment. When the next syllable is also a fourth tone, 不 is pronounced in the second tone, bú. That is why 不是 is bú shì and not bù shì, and why 不要 is bú yào.

Before a first, second or third tone, 不 keeps its fourth tone: 不吃 (bù chī), 不行 (bù xíng), 不好 (bù hǎo), 不想 (bù xiǎng), 不知道 (bù zhīdào). The rule looks at the tone of the following syllable, not at the meaning of the phrase, so you have to know how the next word is pronounced before you can say 不 correctly.

The reason is physical. A fourth tone is a sharp fall, and two falls in a row force the voice to reset in the middle. Mandarin avoids that by turning the first fall into a rise, so the sequence becomes rise then fall. Dictionaries and textbooks write bú shì to show the spoken form, while the character itself never changes.

A few details keep the rule from becoming a trap. 不 standing alone, or at the end of an answer, stays bù. 不 before a syllable that has turned light in speech still follows that syllable's original tone: 不客气 is bú kèqi because 客 is underlyingly fourth tone, even though the 气 after it is neutral. And in a handful of fixed words 不 is simply neutral and unmarked, as in 差不多 (chàbuduō, "almost") and 来不及 (láibují, "too late").

不是 (bú shì) is the negation of 是, and it answers 是 questions: 你是学生吗？(nǐ shì xuéshēng ma?) — 不是 (bú shì). 他是你哥哥吗？— 不是。 It denies identity or category, and it is the direct counterpart of the 是 answer described on the yes page.

没有 (méiyǒu) is the negation of 有, and it covers both possession and existence: 你有时间吗？(nǐ yǒu shíjiān ma?) — 没有。 你有钱吗？(nǐ yǒu qián ma?, "do you have money?") — 没有。 The form 不有 does not exist in Mandarin. 有 is one of the few verbs with a dedicated negative, and using 不 with it is the clearest possible sign that a sentence was built from an English template.

不行 (bù xíng) means "that will not work". It refuses a plan or denies feasibility: 明天行吗？(míngtiān xíng ma?, "does tomorrow work?") — 不行。 It is direct, and between equals it is perfectly normal. To a client or a senior colleague, 不太行 (bú tài xíng, "not really workable") or 不太方便 (bú tài fāngbiàn, "not very convenient") softens it without changing the answer.

不可以 (bù kěyǐ) refuses permission and can also state a prohibition: 我可以进去吗？(wǒ kěyǐ jìnqu ma?, "may I go in?") — 不可以。 On signs and in rules it functions like "not allowed", which makes it stronger than a personal refusal. For a personal "I would rather not", 不太方便 is usually the better choice.

不要 (bú yào) means "I do not want it" and declines an offer or a choice: 你要咖啡吗？(nǐ yào kāfēi ma?) — 不要，谢谢。 It is the natural negative of 要, and because 要 is the verb used for ordering, 不要 is also what you say when you are turning something down at a counter.

不用了 (bú yòng le) means "no need" and is the polite way to decline help: 我帮你拿？(wǒ bāng nǐ ná?, "shall I carry it for you?") — 不用了，谢谢。 The 了 marks a change of state — the offer is closed — and the phrase is softer than 不要 because it declines the effort rather than the thing. In most everyday situations this is the safest refusal in the language.

别 (bié) is the imperative negative. It goes directly before a verb and tells someone not to do something: 别走 (bié zǒu, "do not go"), 别客气 (bié kèqi, "do not stand on ceremony"), 别忘了 (bié wàng le, "do not forget"). It is short, informal and extremely common in speech.

别 and 不要 overlap, but they are not interchangeable in tone. 别 is the everyday spoken imperative, while 不要 before a verb sounds more like a warning or a rule: 不要忘记 (bú yào wàngjì, "do not forget") is what you read on a notice, and 别忘了 is what a friend says at the door. 不要 is also the word for "I do not want", which 别 cannot mean.

One homonym to keep separate: 别 also means "other", as in 别人 (biéren, "other people") and 别的 (biéde, "other things"). Same pronunciation, different word. Context decides, and in practice the two never collide because one is followed by a verb and the other by a noun.

不客气 (bú kèqi) is the standard reply to 谢谢 (xièxie, "thank you"). Literally it means "not polite" — the sense is "do not be so polite about it". The 不 is bú because 客 is a fourth tone. It is the phrase a textbook teaches, and it is what most native speakers say in a neutral or service situation.

不用谢 (bú yòng xiè) means "no need to thank", and it is slightly more literal and a little warmer in casual use. 不用 (bú yòng) on its own means "need not", so the phrase is built from the same 用 as 不用了. Both replies are correct; 不客气 is the safer default with strangers, and 不用谢 is common between people who know each other.

Two more replies belong in the same set. 没事 (méi shì, "no matter") and 没关系 (méi guānxi, "it does not matter") answer an apology rather than thanks, and 应该的 (yīnggāi de, "it is what I should do") is a modest reply that deflects gratitude. Mixing these up is harmless but noticeable.

不 and 没 divide the work of negation, and the division is one of the most useful things to learn early. 不 negates general truths, habits, willingness and adjectives. 没 negates past events and the verb 有. The two are not interchangeable, and swapping them changes the meaning rather than just the style.

Compare 我不去 (wǒ bú qù) and 我没去 (wǒ méi qù). The first is a decision about the future or a general refusal: "I am not going." The second is a report about the past: "I did not go." The same contrast appears in 他不吃 (tā bù chī, "he does not eat it") versus 他没吃 (tā méi chī, "he did not eat it").

不 is also the normal negator for adjectives: 不好 (bù hǎo, "not good"), 不累 (bú lèi, "not tired"), 不方便 (bù fāngbiàn, "not convenient"). 没 does not negate adjectives in ordinary use, with one exception: comparison, as in 他没我高 (tā méi wǒ gāo, "he is not as tall as me"). That construction is worth recognizing, but it is a different pattern from a plain refusal.

Finally, two verbs take suppletive negatives that have to be memorized rather than derived. 是 becomes 不是, and 有 becomes 没有. There is no 不有 and no 没是. These two pairs account for a large share of beginner errors, because they are exactly the places where a literal translation from English produces a form that does not exist.

A direct 不 costs the other person face, especially when the invitation comes from someone older, a client, or a host. Chinese handles this with a set of soft refusals that are understood as no by everyone involved, even though none of them contains the word 不.

The most common are 再说吧 (zài shuō ba, "let us talk about it later"), 下次吧 (xià cì ba, "next time"), 我考虑一下 (wǒ kǎolǜ yíxià, "let me think about it" — the 一 is yí because 下 is a fourth tone), 不太方便 (bú tài fāngbiàn, "not very convenient"), 我再想想 (wǒ zài xiǎngxiang, "let me think again") and 改天吧 (gǎitiān ba, "some other day"). These are not invitations to keep asking. They are refusals delivered with a door left politely ajar.

Reading them correctly matters as much as producing them. If a colleague says 下次吧 twice, the answer is no. If a host offers more food and you say 不用了，谢谢, the offer is closed. A learner who treats these as "maybe" will keep pushing and will be seen as not understanding the culture, which is a worse outcome than a clumsy but clear refusal.

• 再说吧 — "let us talk about it later": a soft no to a plan.
• 下次吧 — "next time": a soft no to an invitation.
• 我考虑一下 — "let me think about it": a soft no in a business setting.
• 不太方便 — "not very convenient": a soft no that avoids naming a reason.
• 我再想想 — "let me think again": a soft no that ends the current request.
• 不用了，谢谢 — "no need, thank you": the polite way to decline an offer of help.

These errors are made by people who already know the words, which is why they are worth naming. Each one comes from carrying an English habit into a language that organizes refusal differently.

The tone rule is the most common failure. Saying bù shì instead of bú shì is understandable but wrong, and because 不 is such a frequent syllable, the error repeats in almost every sentence. The fix is mechanical: before you say 不, check the tone of the syllable after it. After a few weeks it becomes automatic, and until then it is worth slowing down.

The remaining errors are structural. 不有 appears when a learner translates "do not have" word by word. A bare 不 appears when a learner translates "no" as a complete answer. 别 and 不要 get swapped because both can mean "do not". And 没 and 不 get swapped because English uses one past tense for both "did not" and "will not". None of these are pronunciation problems; all of them are mapping problems.

• Saying bù shì instead of bú shì. The fourth tone after 不 forces the change.
• Saying 不有 for "do not have". The correct form is 没有.
• Answering a question with a bare 不. Negate the verb instead: 不去, 不要, 不行.
• Using 别 for "I do not want". 别 is imperative only; wanting takes 不要.
• Using 不 for a past event. 我没去 is "I did not go"; 我不去 is "I am not going".
• Using 不 to decline an offer from a host. 不用了，谢谢 is the expected form.

In connected speech 不 is one of the fastest syllables in the language, and the tone change is often the main cue that separates a refusal from its opposite. 不是 bú shì and 不错 bú cuò pass by in a fraction of a second, and the rise before the fall is easy to miss if you are waiting for a full fourth tone.

The bigger risk is confusing 没 and 不, because they differ by a single syllable and reverse the meaning of the sentence. 我没去 and 我不去 both translate loosely as "I am not going" in a learner's head, but one reports the past and the other states a decision. In a video, the difference is often carried by a syllable you did not quite hear.

That is the practical case for working from a transcript. A timed Chinese text with pinyin lets you check whether the syllable was méi or bù, and whether the 不 that follows was bú or bù, after the moment has passed. SubChinese produces exactly that from a local video, which turns a missed negation into something you can inspect rather than guess at.