"又" is used when the repeated action has ALREADY occurred. It often appears with 了 and refers to something that happened again in the past or present moment. "再" is used when the repeated action has NOT YET occurred — it refers to a future or planned repetition.
Quick tip: 又 = "did it again (already)" · 再 = "will do it again (later)"
又 yòu
过去 / 已发生
常带"了" · 表示动作已经再次发生 Past tense · often with 了
再 zài
未来 / 未发生
不带"了" · 表示动作将要再次发生 Future tense · no 了
对比项目
又 (yòu)
再 (zài)
时态
过去 / 已发生 past / already happened
未来 / 未发生 future / not yet happened
常见搭配
又 + V + 了 常带"了"
再 + V 不带"了"
例句 A
他昨天来过,今天怎么又来了? He came yesterday — why did he come again today?
今天太忙了,我们明天再见面吧。 Too busy today — let's meet again tomorrow.
例句 B
你怎么又喝可乐了?已经喝了两瓶了! Why are you drinking cola again? You've had two bottles!
这本书太难了,我明天再看吧。 This book is too hard — I'll read it again tomorrow.
否定形式
又不 / 又没 e.g. 他又没来
不再 / 别再 e.g. 别再喝可乐了
修订例句 · Revised Examples
1你怎么又想喝可乐了?上午刚喝过一瓶,喝多了对身体不好。
nǐ zěn me yòu xiǎng hē kě lè le ? shàng wǔ gāng hē guò yì píng , hē duō le duì shēn tǐ bù hǎo 。
Why do you want to drink Coke again? I just drank a bottle this morning. Drinking too much is not good for your health.
2昨天他又迟到了,上周也因为堵车迟到两次,被同事提醒了。
zuó tiān tā yòu chí dào le , shàng zhōu yě yīn wèi dǔ chē chí dào liǎng cì , bèi tóng shì tí xǐng le 。
He was late again yesterday, and he was late twice last week because of traffic jams, so he was reminded by his colleagues.
In Chinese, interrogative pronouns (什么, 哪儿, 谁, 怎么, 什么时候, etc.) can be used in pairs to express "whatever / wherever / whoever / however." The key rule: use the SAME interrogative pronoun in both clauses, connected by 就.
When both clauses share the same subject, the second subject can be omitted.
When the subjects are DIFFERENT, Subject 2 MUST come BEFORE 就 — never after it.
规则A · 同主语 (Same Subject)
公式:主语 + [疑问词 + V]₁,就 + [疑问词 + V]₂
主语只出现一次,第二分句省略主语。 Example: 你想吃什么,就吃什么。= Whatever you want to eat, (you) eat it.
规则B · 异主语 (Different Subjects)
公式:主语1 + [疑问词 + V]₁,主语2 + 就 + [疑问词 + V]₂
⚠️ 关键:主语不同时,主语2必须放在"就"的前边,不能放在"就"的后边! Example: 你想去哪儿,我就去哪儿。= Wherever you want to go, I'll go there too.
⚠️ Error Alert · 常见错误:异主语时的语序错误
❌
你想吃什么,就我吃什么。
Wrong! 异主语时,第二个主语"我"必须放在"就"的前边,不能放在"就"的后边。
✅
你想吃什么,我就吃什么。
Correct! Subject 2 (我) comes BEFORE 就. Rule: 主语1 + 疑问词 + V,主语2 + 就 + 疑问词 + V.