1.
He knows, doesn't he? -- No, he doesn't.
他知道吧? --不， 他不知道。
2.
He doesn't know, does he? -- Yes, he does.
他不知道吧? --不， 他知道。
3.
Do you understand anything they're saying?
你知不知道他们说什么？
4.
He knows he's not a fit match for you.
他知道他配不上你。
5.
I know of him, but I do not know him personally.
我知道他，但不认识他。
6.
He doesn't know where he is.
(英)他不知道他自己的立
7.
If he ignores this, he himself will be ignored.
若有不知道的、由他不知道罢。
8.
You don' t know his address, neither do I.
你不知道他的地址，我也不知道。
9.
I do not know whether he dares try .
我不知道他敢不敢做。
10.
I wonder if he is a spy.
我不知道他是不是密探。
11.
For a moment he did not know how to reply.
他一时不知道如何作答。
12.
"I don't know. He's got a high fever."
“我不知道，他在发高烧。”
13.
He knew that his days were numbered.
他知道自己来日不多了。
14.
I doubt whether he will recover.
我不知道他是否会康复。
15.
doesn't know when he's well-off.
不知道他什么时候走运。
16.
He knew that it was impossible.
他知道那是不可能的。
17.
I know he meant Business.
我知道他不是开玩笑的。
18.
It does not know their names, even.
甚至不知道他们的名字。