Negation: 不, 没, & 别
否定副词
Negate actions and states correctly
不 negates habitual actions, states, and willingness. 没(有) negates completed or experienced actions. 别 is a command meaning "don't."
The only verb that never uses 没 for negation is 是. You always say 不是, never 没是.
Lesson Targets
Podcast
Podcast: Negation: 不, 没, & 别 (否定副词)
Listen to Jason & Amy explain the 否定副词 pattern
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Understanding 否定副词
Chinese has three main negation words, and each one has its own job. 不 (bù) is for things that are generally true or that you choose — "I don't eat meat" or "It's not cold." 没 (méi) is for things that didn't happen — "I didn't go" or "I haven't eaten." And 别 (bié) is your go-to for telling someone "don't do that!" Pick the wrong one and the meaning changes completely. Think of it like traffic lights: 不 is a permanent red light (you never go that way), 没 is a report that the light was red (you didn't go that time), and 别 is someone shouting "Stop!" at you right now. This three-way split might seem tricky, but once you feel the logic, it becomes second nature.
Key Points
- 不 negates the present tense, habits, adjectives, and willingness: 我不喝酒 (I don't drink alcohol).
- 没(有) negates past actions and experiences: 我没去过中国 (I haven't been to China).
- 别 is an imperative — it tells someone not to do something right now: 别说话！(Don't talk!)
- 不 changes to second tone (bú) before a fourth-tone syllable: 不是 → búshì.
- 有 (to have) is special: its negation is always 没有, never 不有.
- 不 is about attitude and choice; 没 is about facts and events. "I don't eat fish" (不吃) vs. "I didn't eat fish" (没吃) — totally different meanings.
- 别 can be softened with 了 at the end: 别哭了 (stop crying) is gentler than 别哭！(don't cry!).
- 不用 (bú yòng) means "no need" and is a polite way to decline: 不用了，谢谢 (no need, thanks).
Saying 别客气 (bié kèqi — don't be polite) is one of the most common phrases in Chinese. It's the standard reply to 谢谢 and means something like "don't mention it."
Key Vocabulary
Example Sentences
今天不热。
It's not hot today.
Negating an adjective
我不喜欢吃辣的。
I don't like eating spicy food.
他没吃早饭。
He didn't eat breakfast.
Past event that didn't happen
我没有钱。
I don't have money.
别进来！
Don't come in!
A direct command
别担心，没问题。
Don't worry, no problem.
医生说我不能吃太多糖。
The doctor said I can't eat too much sugar.
At the doctor — negating ability/permission
我昨天没去上课。
I didn't go to class yesterday.
At school — past action that didn't happen
别玩手机了，快写作业！
Stop playing on your phone, hurry up and do homework!
Parent to child — 别…了 means "stop doing"
不用了，我自己来。
No need, I'll do it myself.
Politely declining help — very common phrase
Common Mistakes
For a past event that didn't happen, use 没, not 不. 不 would mean you generally refuse to go.
是 is always negated with 不, never with 没. This is one of the few absolute rules.
To give a negative command ("don't go!"), use 别, not 不.
Practice Exercises
Tips & Tricks
Easy rule of thumb: if you can say "yesterday" in the sentence, you probably need 没. If you can say "usually" or "generally," use 不.
Remember 别客气 — you'll hear it a hundred times a day in China. It's the perfect example of 别 in a friendly, everyday context.
Watch the tone change: 不 is normally fourth tone (bù), but it becomes second tone (bú) before another fourth tone.
Mnemonic: 不 looks like a person standing with arms spread saying "Nope, not happening" (general refusal). 没 has the water radical — things that have "flowed away" into the past.
Three magic phrases to memorize: 不是 (it's not), 没有 (don't have / didn't), 别客气 (don't be polite). These three cover a huge chunk of daily negation.
Homework
Write a short paragraph about what you didn't do yesterday (using 没) and what you generally don't like (using 不). Bonus: include one 别 sentence as advice to a friend.