不再 vs 再不 (bùzài vs zàibù): no longer vs if not...then
不再 (bùzài) means 'no longer' or 'not anymore', describing a permanent cessation of an action or state. 再不 (zàibù) is a conditional conjunction meaning 'if not...then', often used with 就 (jiù) to express a warning or consequence. The same morphemes in reversed order create completely different meanings and grammatical roles.
The pair 不再 and 再不 are formed from the same two characters but in reversed order, leading to distinct meanings. 不再 (bùzài) is an adverb meaning 'no longer' or 'never again', indicating that a previously true situation has ceased and will not resume. 再不 (zàibù) is a conjunction used in conditional clauses to mean 'if (someone) still does not do something', often followed by a result clause with 就 (jiù). Understanding the word order and context is key: 不再 negates continuity, while 再不 negates a future action in a conditional structure.
When to use each
Use 不再 to state that an action or state that existed in the past has stopped permanently. It is placed before the verb it modifies. Common in both spoken and written Chinese for expressing cessation, e.g., 不再做 (no longer do) or 不再去 (no longer go). It can also express a decision for the future: 'I will never again...'.
不再 is neutral in tone and simply reports a change of state. It often pairs with 了 (le) to emphasize the change.
Use 再不 in conditional sentences to mean 'if (someone) still does not do something', typically followed by a consequence clause. The structure is 再不 + verb/phrase + (就) + result. It is common in warnings, suggestions, or threats. Example: 再不来就晚了 (If you still don't come, it will be late).
Here 再 means 'again' or 'still' and combines with 不 to negate. 再不 is not a standalone adverb; it functions as a two-character conditional conjunction. The consequence can be implied without 就, but 就 clarifies the result.
At a glance
| 不再 | 再不 | |
|---|---|---|
| Core meaning | Cessation: no longer | Conditional: if not...then |
| Grammatical role | Adverb before verb | Conjunction introducing conditional clause |
| Typical structure | 不再 + verb + (了) | 再不 + verb + (就) + consequence |
| Negation focus | Negates continuation of a state/action | Negates a future action in a condition |
| Tone | Neutral, factual | Warning, urgency |
Examples
- 不再他不再抽烟了。Tā bùzài chōuyān le.He no longer smokes.Correct use of 不再 for permanent cessation.
- 再不你再不来，我们就要走了。Nǐ zài bù lái, wǒmen jiù yào zǒu le.If you still don't come, we are leaving.Cond Found. The hanzi is 你再不来, not 你再来. Pinyin matches the conditional meaning.
- 不再我不再相信他了。Wǒ bùzài xiāngxìn tā le.I no longer believe him.
- 再不再不吃药，病会更重。Zài bù chī yào, bìng huì gèng zhòng.If you still don't take medicine, the illness will get worse.Consequence clause without 就 is acceptable; meaning is clear.
- 不再她不再住在这里了。Tā bùzài zhù zài zhèlǐ le.She no longer lives here.
- 再不再不好好学习，就考不上大学。Zài bù hǎohao xuéxí, jiù kǎo bù shàng dàxué.If you still don't study hard, you won't get into college.Typical warning with 就.
Common mistakes
- Using 不再 in a conditional warning: '不再来就晚了' (wrong; should be 再不).
- Using 再不 to mean 'no longer': '我再不抽烟了' (wrong; should be 不再).
- Confusing 再不 with 再也不 (zàiyě bù, 'never again')—though related, they are different patterns.
- Omitting the consequence clause after 再不: in many contexts the result must be stated or implied clearly.
FAQ
- When do I use 不再 vs 再不?
- Use 不再 to say something has stopped permanently (e.g., 'no longer' or 'not anymore'). Use 再不 in conditional sentences to say 'if still not... then...', often with a warning or consequence. The order of 不 and 再 determines the meaning.
- Can 不再 be used in conditional sentences?
- No, 不再 is not used in conditional structures. It only makes declarative statements about cessation. For a conditional meaning, use 再不.
- Is 再不 always followed by 就?
- Often, but not always. 就 clarifies the result, but the consequence can be implied from context. For example, 再不来，我们不等了 (If you still don't come, we won't wait) — 就 is omitted but still understood.
- What is the difference between 不再 and 再也不?
- 再也不 (zàiyě bù) is an intensifier meaning 'never again', often with 了. It emphasizes a firm decision or permanent stop, similar to 不再 but stronger. Both express cessation, but 再也不 is more emphatic and colloquial. Note: 再也不 is not a conditional; do not confuse with 再不.