This word is used informally and in spoken language, especially byteenagers who don’t want to answer their parents!

　　这个词为非正式用语，一般在口语中使用，孩子们不想回答父母的问题时会经常用到这个词。

　　e.g. ‘When do you have to submit this essay?’ ‘Dunno.I can’t remember.'

　　例句：“你什么时候要交论文？”“不知道，不记得了。”

　　2.I have no idea/I haven’t a clue/I haven’t the faintestideaThese expressions are used when you have no information and you cannotguess the answer to a question.

　　这些表达通常用在你没有任何关于这个问题的信息，无法猜到答案的时候。

　　e.g. ‘What time does the film start?’ ‘I have noidea. Why don’t you call the cinema?’

　　例句：“电影什么时候开始？”“不清楚，你为什么不打电话问电影院呢？”

　　3. How should I know?/Don’t ask me/Search meThese expressions are used when you do not know something and you feelannoyed 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?’ ‘Howshould I know? I’ve 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。”

　　4. Who knows?/It’s anyone’s guess

　　These are used for saying that you don’t know something because it isimpossible for anyone to know it.

　　当你不知道问题的答案，而且其他人也不可能知道的时候，就可以用这两句。

　　e.g. ‘Will they ever find the missing aircraft?’ ‘Whoknows? The search been going on for such a long time now.’

　　例句：“他们会找到失踪的飞机吗？”“谁知道呢？搜寻工作已经进行了这么长时间了。”

　　5. Your guess is as good as mine

　　This is used for saying that you know as little about something as theperson who asked you about it.

　　如果你和提问题的人一样不知道问题的答案，你就可以这样说。

　　e.g. ‘Do you think we will be able to book the restaurant for Friday?’‘Your guess is as good as mine.’

　　例句：“你觉得我们能在周五预定到这家餐厅吗？”“我和你一样不知道。”

　　6. Not as far as I know

　　We use this to say that something may be true, but you do not have enoughinformation to know whether it is or not.

　　当你认为某件事可能是真的但又不确定的情况下，可以用这个表达。

　　e.g. ‘Has Clive left the company? I haven’t seenhim for ages.’ ‘Not as far as I know, but I haven’t seen him recently either.’

　　例句：“Clive离开公司了吗？我好久都没见到他了。” “可能吧，我也很久没见他了。”

　　7. It beats me

　　This is a rather informal expression to say that you do not know orunderstand something. “It” is often left out.

　　这是一种表达你不知道或不懂的非正式用语。“it”可省去。

　　e.g. ‘Why did he do such a stupid thing?’ ‘Itbeats me’

　　例句：“他怎么会做这种蠢事？”“不知道啊”