| 非…不可 | fēi bù kě | must... |
| 一丁不识 | yī dīng bù shí | illiterate, ignorant |
一不做，
二不休 | yī bù zuò ,
èr bù xiū | don't do it, or don't rest (idiom); either give up, or go through to the end; Since we started, we must carry it through whatever happens.; in for a penny, in for a pound |
| 一去不回 | yī qù bù huí | gone forever |
| 一问三不知 | yī wèn sān bù zhī | lit. to reply "don't know" whatever the question (idiom); fig. absolutely no idea of what's going on; complete ignorance |
| 一尘不染 | yī chén bù rǎn | untainted by even a speck of dust (idiom); selfless and incorruptible; spotless |
| 一字不提 | yī zì bù tí | to not mention a single word (about sth) (idiom) |
| 一字不识 | yī zì bù shí | to be unable to distinguish good from bad (idiom) |
| 一文不值 | yī wén bù zhí | worthless (idiom); no use whatsoever |
| 一丝不挂 | yī sī bù guà | not wearing one thread (idiom); absolutely naked; without a stitch of clothing; in one's birthday suit |
| 一声不吭 | yī shēng bù kēng | to not say a word |
一着不慎，
满盘皆输 | yī zhāo bù shèn ,
mǎn pán jiē shū | one careless move and the whole game is lost (idiom) |
| 一言不发 | yī yán bù fā | to not say a word (idiom) |
| 一语不发 | yī yǔ bù fā | to not say a word (idiom) |
| 一钱不值 | yī qián bù zhí | not worth a penny; utterly worthless |
| 一点不 | yī diǎn bù | not at all |
| 一点也不 | yī diǎn yě bù | not in the least; no way |
| 三不 | sān bù | the three no's (abbreviated catchphrase) |
| 三不知 | sān bù zhī | to know nothing about the beginning, the middle or the end; to know nothing at all |
| 上梁不正下梁歪 | shàng liáng bù zhèng xià liáng wāi | lit. If the upper beam is not straight, the lower beam will be crooked (idiom); fig. subordinates imitate their superiors' vices |
| 上气不接下气 | shàng qì bù jiē xià qì | not enough breath (idiom); to gasp for breath |
| 下不为例 | xià bù wéi lì | not to be repeated; not to be taken as a precedent; just this once |
| 下落不明 | xià luò bù míng | unaccounted; unknown whereabouts |
| 不一会 | bù yī huì | soon |
| 不一样 | bù yī yàng | different; distinctive; unlike |
| 不一致字 | bù yī zhì zì | inconsistent phonogram(s) |
| 不三不四 | bù sān bù sì | dubious; shady; neither one thing nor the other; neither fish nor fowl; nondescript |
| 不下 | bù xià | to be not less than (a certain quantity, amount etc) |
| 不下于 | bù xià yú | as many as; no less than; not inferior to; as good as; on a par with |
| 不中意 | bù zhòng yì | not to one's liking |
| 不丹 | Bù dān | Bhutan |
| 不主故常 | bù zhǔ gù cháng | not to stick to the old conventions |
| 不久前 | bù jiǔ qián | not long ago |
| 不干不净 | bù gān bù jìng | unclean; filthy; foul-mouthed |
| 不了了之 | bù liǎo liǎo zhī | settle a matter by leaving it unsettled; end up with nothing definite |
| 不予理会 | bù yǔ lǐ huì | to ignore; to brush off; to dismiss; to pay no attention to |
| 不予评论 | bù yǔ píng lùn | No comment! |
| 不二价 | bù èr jià | one price for all; fixed price |
| 不二法门 | bù èr fǎ mén | the one and only way; the only proper course to take |
| 不亚 | bù yà | no less than; not inferior to |
| 不亚于 | bù yà yú | no less than; not inferior to |
| 不亢不卑 | bù kàng bù bēi | neither haughty nor humble; neither overbearing nor servile; neither supercilious nor obsequious |
| 不亦乐乎 | bù yì lè hū | lit. isn't that a joy? (quote from Confucius); fig. (jocularly) extremely; awfully |
| 不人道 | bù rén dào | inhuman |
| 不介意 | bù jiè yì | not to take offense; do not mind |
| 不令人鼓舞 | bù lìng rén gǔ wǔ | discouraging; disheartening |
| 不以人废言 | bù yǐ rén fèi yán | not to reject a word because of the speaker (idiom, from Analects); to judge on the merits of the case rather than preference between advisers |
不以规矩，
不能成方圆 | bù yǐ guī ju ,
bù néng chéng fāng yuán | without rules, nothing can be done (idiom, from Mencius); one must follow some rules |
| 不以词害志 | bù yǐ cí hài zhì | don't let rhetoric spoil the message (idiom); don't get carried away with flowery speech to the detriment of what you want to say |
| 不以辞害志 | bù yǐ cí hài zhì | don't let rhetoric spoil the message (idiom); don't get carried away with flowery speech to the detriment of what you want to say |
