e.g. Would you by any chance know where St Jamess Street is? I havent a clue. Sorry.

　　例句：你知道圣詹姆斯大街在哪儿吗？ 不好意思，不太清楚。

　　e.g. Could somebody please explain how this happened? I havent the faintest idea.

　　例句：有没有人能解释一下这是怎么回事？ 我也不知道。

　　3. How should I know?/Dont ask me/Search me

　　These expressions are used when you do not know something and you feel annoyed that someone is asking you about it。

　　当你不知道问题的答案，又很反感别人问你时，可以这么说。

　　e.g. Who left this mess on the table? How should I know? Ive only just come home.

　　例句：谁把桌子弄得一团乱？ 我怎么知道，我才刚到家。

　　e.g. What time did she say she was catching her train? Dont ask me. Im always the last to know.

　　例句：她什么时候说她在赶火车来着？ 别问我，我总是最后一个知道的。

　　e.g. Why didnt he ask you for the keys? Search me. Im not a mind reader.

　　例句：为什么他不问你要钥匙呢？ 不知道，我又不会读心术。

　　4. Who knows?/Its anyones guess

　　These are used for saying that you dont know something because it is impossible for anyone to know it。

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