Until then he had known nothing about it yet.

到那时为止，他对此仍一无所知。

youdao

I would sooner you had known nothing about it.

我宁愿你对此事一无所知。

youdao

He kept silent as though he had known nothing about the matter.

他保持沉默，好像他对那件事情一无所知。

youdao

She also said Commons authorities had known nothing about the Guardian order at the time.

BBC: Commons in court gagging warning

Their leader maintained that he had known nothing about what was going on.

FORBES: Ex-Barclays CEO Says Libor Is Not Diamond's First Brush With Scandal

Bin Laden again claimed responsibility for the September 11 attacks, but said that Afghans had known nothing about the plot.

CNN: Analysis: Afghanistan top of al Qaeda's agenda