谁知道

• Pinyin: shéi zhī dào
• Hanzi breakdown: 谁 = 讠+ 隹 (who); 知 = 矢 + 口 (to know); 道 = 首 + 辶 (path, to know)

Meaning

Who would have known; who knows; unexpectedly. Used to express surprise at an unforeseen turn of events.

A colloquial expression used rhetorically — it does not literally ask who knows something, but instead signals that an unexpected or ironic outcome has occurred. Common in storytelling and informal speech.

Examples

1. 谁知道一场小误会竟然变成了一段美好的友谊。 Who would’ve thought a small misunderstanding would turn into a wonderful friendship.
2. 我以为那次演讲会失败，谁知道反响出奇地好。 I thought that speech would flop—who knew the response would be surprisingly good.
3. 谁知道他离开公司后，反而创业成功了。 Who knew that after he left the company, he’d actually succeed as an entrepreneur.

Usage Guide

Context: storytelling, everyday, narrative

Tone: surprised

Do Say

• 谁知道当年那个内向的小孩，后来成了著名的演说家。(Who would have known that the shy child back then would become a renowned public speaker.)
• 本以为这次合作会很顺利，谁知道中途出现了这么多变故。(We thought the collaboration would go smoothly, but unexpectedly so many complications arose along the way.)

Don't Say

• 谁知道 in formal writing — use 出乎意料 or 意想不到 in academic or official contexts instead

Origin & History

谁 (who) + 知道 (to know) — rhetorical: 'who could have known'

Cultural Context

Generation: All ages

Social background: Universal