"I know not!" she hurriedly replied.

她匆匆地回答说：“我不知道！”

youdao

What knowest thou, that we know not?

你知道什么是我们不知道的呢？

youdao

"Nay, I know not," said the woman, "and you cannot see!"

“不，我不知道，”老太婆说，“你也看不见！”

youdao

"Aylmer," said Georgiana, "I do not know what the cost would be to both of us to remove this birthmark.

VOA: special.2009.09.26

I know not what the younger dreams-- Some vague Utopia--and she seems, When withered old and skeleton-gaunt, An image of such politics.

我不知年幼者梦想什么-,某种模糊的乌托邦--她仿佛，当枯萎衰老瘦骨嶙峋的时候，这类政治的一个鬼影。

耶鲁公开课 - 现代诗歌课程节选

It might be like a single, a single mother, you know. She might not get home from work until like 6.

也有可能是个单亲母亲。她下班到家可能要6点之后了。

哈莱姆的变迁 - SpeakingMax英语口语达人

Borussia Dortmund is a club where the fans know not to get too attached.

WSJ: Borussa Dortmund Dismayed by G?tze's Transfer to Bayern Munich

How far he will be able to keep to this wise resolve I know not.

BBC: Charles Darwin letters reveal his emotional side

The corporate MBAs sitting on a few billion they know not what to do with?

FORBES: Apple's Cash Pile, Dividends and Taxes on Overseas Profits