1. You know what?
    表示有事(通常是說(shuō)話(huà)者認(rèn)為比較重要的事)要告訴對(duì)方，意為：我告訴你吧! 如：
    You know what? I think I’ve found a way to make alittle money. 我告訴你吧，我已想到一個(gè)賺點(diǎn)錢(qián)的辦法。
    有時(shí)也說(shuō)成 You know something? 或Do you know what?或 Do you know something? 如：
    You know something, Mary? Mr Harris is the nicestman I know, except for my father. 我來(lái)告訴你吧，瑪麗，哈里斯先生是除我父親之外我所認(rèn)識(shí)的的人。
    2. You never know.
    用于委婉地表示沒(méi)有把握，意為：說(shuō)不準(zhǔn);這事很難說(shuō);事情很難預(yù)料。如：
    You never know, it may stop raining by tomorrowmorning. 說(shuō)不定這雨到明天早上就不下了呢。
    A：Will you be coming next week? 你下周會(huì)回來(lái)嗎?
    B：You never know. 說(shuō)不定。
    A：Do you think he will come to meeting? 你認(rèn)為他會(huì)來(lái)參加這個(gè)會(huì)議嗎?
    B：You never know, but I hope he will. 這說(shuō)不定，但我希望他會(huì)來(lái)。
    有時(shí)可用于過(guò)去，如：
    A：Did he meet her at the party? 他在晚會(huì)上見(jiàn)到她了嗎?
    B：You never know. 不清楚。