There is nothing one does not… (无所不)

Structure 无所不 + monosyllabic verb (无所不知 / 无所不能 / 无所不在)

无所不 (wú suǒ bù) is a literary double negative built with the nominalising particle 所: literally "there is nothing one does not…", i.e. one does/knows/covers everything. It matches the English prefix "omni-": 无所不知 "omniscient", 无所不能 "omnipotent", 无所不在 "omnipresent", 无所不包 "all-embracing". It is always followed by a monosyllabic verb and forms fixed four-character expressions (chengyu) of written register; you don't coin new combinations freely.

Examples

他tā博bó览lǎn群qún书shū，几jī乎hū无wú所suǒ不bù知zhī。
He has read widely and there is hardly anything he doesn't know.
人rén们men曾céng以yǐ为wéi科kē学xué无wú所suǒ不bù能néng。
People once believed that science could do anything.
如rú今jīn广guǎng告gào无wú所suǒ不bù在zài，让ràng人rén难nán以yǐ回huí避bì。
Nowadays advertising is everywhere and hard to escape.
这zhè家jiā公gōng司sī的de业yè务wù无wú所suǒ不bù包bāo。
This company's business covers absolutely everything.

Levels are indicative: they follow the standard Chinese Grammar Wiki (AllSet Learning) progression, not an official HSK 3.0 mapping. We never assign levels by eye.

This point and the other 370, with audio on every example, inside Wanyu.