Don't ask himIt is also at his wit's end

He knows nothing of unprofessional matters

与专业无关的事, 他什么也不知道。

He did not know what was amiss, what he had been doing.

他不知道出了什么差错也不知道自己在干什么。

He'll lie low and pretend he knows nothing about it.

他不会不吭声，假装什么也不知道。

He did not know, he could not guess, what the result would be.

他不知道也不可能猜出结果会是什么。

From the very beginning I knew that he was not much of anything.

一开始我便知道他什么也不行。

I haven' t the faintest notion what they mean.

我一点也不知道他们是什么意思。

Nobody knew what had caused him to blaze out in anger.

谁也不知道什么事惹得他大发雷霆。

He hardly knew why he had ever rebelled.

他也不知道自己为什么要反叛。

Do you understand anything they're saying?

你知不知道他们说什么？

He had no money, nor did he know anyone he could borrow from .

他没有钱，他也不知道他可以向什么人借。

He never knew why she was so angry with him.

他永远也不会知道她为什么如此生他的气。

doesn't know when he's well-off.

不知道他什么时候走运。

I have no idea when he will come.

我不知道他什么时候来。

I wonder how he feels.

真不知道他有什么感想。

He was at a loss for words.

他不知道该说什么。

He had no idea where his brother might be, or even if he were living.

他不知道他的哥哥在什么地方，甚至也不知道是否尚在人世。

He lives in Wiok, wherever that is.

他住在渥克，我也不知道那是个什么地方。

The first great lesson that a young man should learn is that he knows nothing.

年轻人应该上的第一课是他什么也不知道