I did hope he could know how thankful I was!

我真的希望他能知道我是多么感激他！

youdao

The government had news sheets sent to officials in the whole country so people could know what was going on in the capital.

政府向全国官员发送了小报，这样人们就能知道首都正在发生什么事。

youdao

No one could know why he did like that.

没有人知道他这样做的缘故。

《新英汉大辞典》

How could I answer the child? I do not know what it is any more than he.

VOA: special.2009.04.12

- "She lived unknown and few could know"-- how can she be unknown if few know anything about her?

她不为人知地活着，鲜有人知道她“,如果有任何人知道关于她的任何事情,又怎么能说他不为人知呢？

耶鲁公开课 - 文学理论导论课程节选

I wish that I could live in their life for one day, but you know, they're just things.

我希望我可以过一天他们的生活，但是你知道，就是东西而已。

名牌效应 - SpeakingMax英语口语达人

They then could know where they would get the most for their tuition money.

WSJ: Bill Gates on the Importance of Measurement

You could know in advance how something would move or act by knowing what it was.

NEWYORKER: Moon Man

Well, the same way that Apple could know it if they choose to read their own consumer discussion boards.

FORBES: Apple vs. AT&T: Turning The Tables.