1.聽說過I don't know the writer, but I know of him. 我不認識這為作家, 但我聽說過他。If I had known of such a computer in the laboratory, I would have used it long ago. 如果我知道實驗室裡有這樣一台計算機我早就用了。
有經驗He's wide awake, I can tell you, and knows the time of day. There is no cheating him. 我可以肯定地說, 他是機靈的, 而且什麼都知道, 沒有人能夠欺騙他。Thank you for your advice, but I know the time of day. 謝謝你的忠告, 不過我知道該怎麼幹。