不能不

• Pinyin: bù néng bù
• Hanzi breakdown: 不 (not) + 能 (can, able) + 不 (not)

Meaning

Cannot but; have to; must. A double negative expressing strong necessity.

The double negative 不能不 creates an emphatic affirmative, stronger than simply saying 必须 or 要. Used to stress that something absolutely must be done. Common in both spoken and written Chinese.

Examples

1. 这件事关系到公司的未来，我们不能不认真对待。 This matter concerns the company's future — we must take it seriously.
2. 面对这样的证据，他不能不承认自己的错误。 Faced with such evidence, he had no choice but to admit his mistake.
3. 时间紧迫，我不能不提前完成这份报告。 Time is pressing, so I have no choice but to finish this report ahead of schedule.

Usage Guide

Context: persuasion, argument, emphasis

Tone: emphatic

Do Say

• 这一点我们不能不考虑。(This is something we must consider.)
• 他的贡献不能不提。(His contributions must be mentioned.)

Don't Say

• 过度使用'不能不'让文章显得生硬——偶尔用来强调即可 (Don't overuse 不能不 as it makes writing stiff — use it occasionally for emphasis)

Origin & History

Double negative construction: 不能 (cannot) + 不 (not), creating an emphatic 'must.'

Cultural Context

Generation: All ages

Social background: Universal