Did you know that?
know，英語單詞，及物動詞、不及物動詞，作及物動詞時意為“知道；認識；懂得”，作不及物動詞時意為“了解；熟悉；確信”。
例句：
Do you know his address?妳知道他的地址嗎？
The cause of the fire is not yet known.
火災的原因尚不清楚。
All I know is that she used to work in a bank (= I have no other information about her) .
我只知道她曾在銀行工作過。