不 vs 无 (bù vs wú): negation vs. lack/absence
不 is the standard Mandarin negation used with verbs and adjectives to mean 'not'. 无 is a literary word meaning 'without' or 'lacking', typically appearing in fixed compounds and formal expressions. Unlike 不, 无 cannot be used freely as a negation adverb in everyday speech.
Both 不 and 无 express negation, but they operate in different registers and syntactic roles. 不 is a general adverb placed before verbs and adjectives to negate actions or qualities in everyday speech. 无 is a classical-rooted word that functions like a verb meaning 'lack' or 'be without' and survives primarily in fixed compounds, formal writing, and set phrases. While 不 can freely negate most predicates, 无 is restricted to established combinations and literary contexts. A learner should use 不 for spontaneous negation and rely on memorized expressions for 无.
When to use each
Use 不 to negate verbs (except 有), adjectives, and auxiliary verbs in both spoken and written Chinese. It is the default negator for expressing refusal, denial, or lack of a quality. For example, 不去 'not go', 不好 'not good', 不知道 'not know'.
In some fixed expressions like 不客气 'you're welcome' or 不好意思 'sorry/excuse me', 不 is part of a conventional phrase and may not carry a fully literal negation.
Use 无 in formal, literary, or idiomatic contexts to indicate absence or lack, often corresponding to '-less' or 'without'. It appears in set compounds such as 无论 'no matter', 无数 'countless', 无家可归 'homeless'. 无 is also used in classical-style writings and proverbs.
While 无 can be used as a standalone verb meaning 'not have' in very formal writing, in modern spoken Chinese it is almost never used alone; instead, 没有 serves that function.
At a glance
| 不 | 无 | |
|---|---|---|
| Register | Colloquial / general | Literary / formal |
| Part of speech | Adverb (negates following word) | Verb meaning 'lack' (used in compounds) |
| Ability to negate verbs freely | Yes (e.g., 不去, 不吃, 不听) | No (only in fixed compounds, e.g., 无妨 'no harm') |
| Negation of existence | Not used (use 没有) | Possible in formal writing (e.g., 无人在家 'no one is home') |
| Typical sentence examples | 我不喜欢咖啡。 | 他无家可归。 |
Examples
- 不我不去。Wǒ bù qù.I am not going.Everyday negation of a verb.
- 不这本书不好。Zhè běn shū bù hǎo.This book is not good.Negation of an adjective.
- 无无论你去哪里，我都会等你。Wúlùn nǐ qù nǎlǐ, wǒ dōu huì děng nǐ.No matter where you go, I will wait for you.无 is part of the compound 无论 'no matter'.
- 无他无家可归。Tā wú jiā kě guī.He is homeless (has no home to return to).Fixed expression meaning 'without a home'.
- 无我无钱。（✗日常口语）Wǒ wú qián. (✗ rìcháng kǒuyǔ)I have no money. (colloquially unnatural)✗ Using 无 alone is literary; in speech use 我没有钱.
- 无我无喜欢。（✗错误）Wǒ wú xǐhuān. (✗ cuòwù)I not like. (incorrect)✗ 无 cannot negate verbs directly; correct: 我不喜欢.
Common mistakes
- Using 无 as a general negation adverb for verbs, e.g., 无去 instead of 不去.
- Using 无 to mean 'not' in everyday speech, e.g., 无是朋友 instead of 不是朋友.
- Using 无 with adjectives to mean 'not', e.g., 无高兴 instead of 不高兴.
- Confusing 无 with 没有 in spoken contexts; e.g., saying 我无钱 when 我没有钱 is natural.
- Overextending 无 into compound-like structures that are not conventional, e.g., 无时间 (while 无时 is a set phrase but 无时间 is rare; better: 没有时间).
FAQ
- When do I use 不 vs 无?
- Use 不 for everyday negation of verbs and adjectives: 不去, 不好. Use 无 only in fixed formal compounds like 无数 'countless' or 无家可归 'homeless'. If you are not sure, choose 不 or 没有 instead.
- Can 无 be used like 不?
- No, 无 cannot replace 不 as a free-standing negator. 不 is an adverb that goes before verbs/adjectives; 无 is a verb-like element that usually belongs to a compound. Writing 无去 for 'not go' is incorrect.
- Is 无 interchangeable with 没有?
- Only in some formal contexts. 没有 is the standard spoken negation for possession/existence. 无 is a literary alternative that appears in set phrases (e.g., 无与伦比 'incomparable') but not in everyday conversation.
- What is the difference between 无 and 没?
- 没 (méi) is used to negate 有 and perfective aspect (e.g., 没有钱, 没去). 无 is a classical remnant meaning 'without'. They are not interchangeable: 没有钱 is normal speech; 无钱 is literary.