Negation 不/没 in Chinese

Overview

Chinese has two main negation words: 不 (bù) and 没 (méi). They are not interchangeable -- each covers different semantic territory. Understanding when to use 不 versus 没 is one of the most important distinctions at the A1 level and continues to be refined as proficiency grows.

At the CEFR A1 level, the core rule is: 不 negates habits, willingness, future actions, and adjectives, while 没 negates completed past actions and the verb 有 (yǒu, to have). You will never see 不有 -- it is always 没有.

A useful mnemonic: 不 is about "won't" or "don't" (choice, habit, state), while 没 is about "didn't" or "hasn't" (fact, occurrence). This distinction reflects how Chinese handles the concept of tense without conjugating verbs.

How It Works

Negation	Pinyin	Used for	Example
不	bù	Habits and routines	我不喝酒 (I don't drink alcohol)
不	bù	States and adjectives	不好 (not good), 不大 (not big)
不	bù	Future/willingness	明天我不去 (I won't go tomorrow)
不	bù	Modal verbs	不会, 不能, 不想
没(有)	méi(yǒu)	Past actions	我没去 (I didn't go)
没(有)	méi(yǒu)	Negating 有	我没有钱 (I don't have money)
没(有)	méi(yǒu)	Uncompleted actions	他没来 (He hasn't come)

Tone sandhi: 不 is normally 4th tone (bù), but changes to 2nd tone (bú) before another 4th tone: 不是 → bú shì.

Important: 没 removes 了 from sentences. You say 我吃了 (I ate) but 我没吃 (I didn't eat), NOT 我没吃了.

Examples in Context

Chinese	Pinyin	English	Note
我不喝咖啡。	Wǒ bù hē kāfēi.	I don't drink coffee.	habit
我没去。	Wǒ méi qù.	I didn't go.	past action
他没有钱。	Tā méiyǒu qián.	He doesn't have money.	negating 有
明天我不去。	Míngtiān wǒ bú qù.	I won't go tomorrow.	future
这个不好。	Zhège bù hǎo.	This is not good.	adjective
她没来。	Tā méi lái.	She didn't come.	past event
我不想吃。	Wǒ bù xiǎng chī.	I don't want to eat.	willingness
他没有看。	Tā méiyǒu kàn.	He didn't watch/look.	past action
我不是学生。	Wǒ bú shì xuéshēng.	I am not a student.	不 with 是
我们没有时间。	Wǒmen méiyǒu shíjiān.	We don't have time.	negating 有

Common Mistakes

Using 不 to negate past actions

• Wrong: 我昨天不去。(I yesterday not go.)
• Right: 我昨天没去。(I didn't go yesterday.)
• Why: Completed past actions are negated with 没, not 不. 不 in this context would mean "I refuse to go" or a habitual statement.

Saying 不有 instead of 没有

• Wrong: 我不有钱。
• Right: 我没有钱。(I don't have money.)
• Why: 有 is the only verb that can NEVER be negated with 不. Its negation is always 没有.

Keeping 了 with 没

• Wrong: 我没吃了饭。
• Right: 我没吃饭。(I didn't eat.)
• Why: 没 already indicates that the action did not happen, so the completion marker 了 is removed.

Confusing habit and past

• Wrong: 我没喝酒 when meaning "I don't drink (as a habit)"
• Right: 我不喝酒 (habitual) vs. 我没喝酒 (I didn't drink [this time])
• Why: Habitual negation uses 不; specific past negation uses 没.

Practice Tips

• When choosing between 不 and 没, ask: "Am I talking about a habit/state/future, or about something that did/didn't happen?" If the former, use 不; if the latter, use 没.
• Practice converting positive sentences to negative: take 我吃了 (I ate) and make it 我没吃 (I didn't eat); take 他很忙 (He is busy) and make it 他不忙 (He is not busy).
• Pay special attention to the 不 tone sandhi rule. Practice saying 不是 (bú shì), 不对 (bú duì), 不去 (bú qù) until the tone change becomes natural.

Related Concepts

• Prerequisite: Basic Sentence Structure -- understand where verbs go before learning to negate them