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Collins Chinese-English Dictionary

不 [bù]
  1. 1. adverb [用于否定句] not
    我不喜欢游泳。
    I don't like swimming.
    不法
    illegal
    不轨
    undisciplined
    不诚实
    dishonest
    不人道
    inhumane
    他不抽烟。
    He doesn't smoke.
  2. 2. adverb [用于否定回答] no
    你累了吧？ 不，不累。
    Are you tired? No, I'm not.
    你不忙吧？ 不，很忙。
    You're not busy, are you? Yes, I am.
  3. 3. adverb [表示不能]
    我吃不下。
    I can't eat it.
    你找不到她吗？
    Can't you find her?
    他中文学不好。
    He's not good at Chinese.
  4. 4. adverb [用于问句]
    你饿不？
    Are you hungry?
  5. 5. adverb [跟‘就是’搭配]
    周末，她不是购物，就是看电视。
    If she doesn't go shopping at the weekend she'll watch TV.
  6. 6. adverb [不用]
    不客气。
    Please don't mention it.
    不谢。
    You're welcome.

Comprehensive Chinese-English Dictionary

不 [bù]
  1. 1. adverb (used before verbs, adjectives, and other adverbs; never before 有) not; won't; not want to
    他的病不(很)严重。
    His illness is not (very) serious.
    他不是学生。
    He isn't a student.
    我不会。
    I don't know how.
  2. 2. adverb (used before certain nouns to form an adjective) un-; in-;
    不法
    lawless; illegal; unlawful
    不轨
    against the law or discipline
  3. 3. adverb (used by itself or with a particle in responses) not so; no
    他知道吗？ —不，他不知道。
    Does he know? —No, he doesn't.
    他不知道吧？ —不，他知道。
    He doesn't know, does he? —Yes, he does.
  4. 4. adverb [Dialect] used at the end of a sntence to indicate that it is a question
    他现在身体好不？
    Is he in good health now?
  5. 5. adverb (used between a verb and its complement) cannot
    进不去
    cannot go in
    拿不动
    find sth. too heavy to carry
  6. 6. adverb (inserted within a reduplication, usually preceded by 什么) no matter (how, where, etc.)
    什么学历不学历，要有真才实学才行。
    It doesn't matter how much formal schooling you've had; what matters is whether you have real ability and learning.
  7. 7. adverb (used correlatively with 就) if not... (then...)
    他这会儿不是在教室，就是在图书馆。
    He's now either in the classroom or in the library.
  8. 8. adverb (used in polite formulas only) don't; needn't
    不谢
    don't mention it; not at all

Contemporary Standard Chinese Dictionary

不 [bù]
  1. 1. 副 用在动词、形容词、名词或个别副词之前，表示否定
  2. 2. a)用在动词、形容词或个别副词之前，表示一般的否定
    不走
    不漂亮
    不太好
    不一定
  3. 3. b)用在相同的动词或形容词之间，构成反复问句
    走不走？
    吃不吃？
    漂亮不漂亮？
  4. 4. c)用在相同的动词、形容词或名词之间(前面加"什么")，表示不在乎或不相干
    什么谢不谢的，别提这个
    什么难不难，只要下功夫就不难
    什么山区不山区，去哪儿都行
  5. 5. d)分别用在两个意思相近或相对的单音节动词、形容词或名词前，表示"如果不……就不……""既不……也不……"，或表示处于中间状态
    不见不散
    不言不语
    不多不少
    不男不女
  6. 6. e)用于某些名词或名词性语素前，构成具有否定意义的形容词
    不法
    不轨
    不道德
  7. 7. 副 单用，表示否定性的回答
    咱们走吧！——不，我再等会儿
    他来开会吧？——不，他不能来
  8. 8. 副 [口] 用在句尾表示疑问，相当于反复问句
    你看书不？
    手绢儿干净不？
  9. 9. 助 用在动补结构中，表示不可能获得某种结果
    赶不到
    吃不得
    写不好
  10. 10. 副 在某些客套话中，表示不必如此，相当于"不用""不要"
    不客气
    不谢
    不送
See more results for 不 in the English-Chinese Dictionary

Examples

上不封顶，下不保底
set no maximum or minimum; impose no ceiling or floor figure
他不知道吧？ —不，他知道。
He doesn't know, does he? —Yes, he does.
他不吃饭不喝酒。
He won't drink unless he's eating. or He only drinks at meals.
这活儿不像样，拿不出手。
This is a shoddy piece of work, it's hardly presentable.
随地吐痰既不雅观也不卫生。
Spitting in public places is not only unbecoming but also unsanitary.
他不至于连这一点道理也不明白。
He must have more sense than that.
成功不骄傲，失败不灰心。
When you succeed don't get conceited; when you fail don't be dejected.
既不实用，又不美观
neither useful nor attractive
我不知道为什么，我就不喜欢他。
I don't know why, I just don't like him.
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nciku Note

The adverb as a conveyor of affirmation or negation

The adverb as a conveyor of affirmation or negation

An adverb is used to modify the adjective or verb as an adverbial adjunct, it should be put before them. Verbs or even nouns ending with character "地" de and functioning as adverbs remain to be regarded as adjectives.

Adverbs can also be used as conveyors of affirmation or negation, such as "不" bù , "没" méi , "没有" méiyǒu , "一定" yídìng, "准" zhǔn , "未必" wèibì , "必然" bìrán , "必定" bìdìng , "未" wèi , "别" bié , "莫" mò , "休" xiū , "勿" wù , etc.
(1) 我不是学生。
(2) 他没看书。
(3) 你一定见过他。
(4) 你准见过他。
(5) 你未必见过他。
(6) 我从未见过他。
(7) 你别去了。
(8) 莫慌。
(9) 请勿在此地乱丢垃圾。

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