如何表达不同情境下的“我不知道”？

1. Dunno

This word is used informally and in spoken language, especially by teenagers who don’t want to answer their parents!
这个词为非正式用语，个别在书面语中利用，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 faintest idea

These expressions are used when you have no information and you cannot guess the answer to a question.
这些表情通常用在你不任何对这个问题的信息，不是猜到答案的时候。

e.g. What time does the film start? I have no idea. 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？

e.g. Would you by any chance know where St James’s Street is? I haven’t a clue. Sorry.
例句：你知道圣詹姆斯大巷在哪儿吗,英语学习网站？ 不好意思，不太清楚。

e.g. Could somebody please explain how this happened? I haven’t the faintest idea.
例句：有不人能说明一下这是怎么回事？ 我也不知道。

3. How should I know?/Don’t 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? 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。

e.g. What time did she say she was catching her train? Don’t ask me. I’m 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 didn’t he ask you for the keys? Search me. I’m not a mind reader,英语学习网站.
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?/It’s anyone’s guess

These are used for saying that you don’t know something because it is impossible for anyone to know it.
当你不知道问题的答案，并且其余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? Who knows? 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，搜查工作已经进行了这么长时间了。

e.g. How the situation will develop from here is anyone’s guess.
例句：谁都不知道事态会如何发展。

5. Your guess is as good as mine

This is used for saying that you know as little about something as the person who asked you about it.
如果你跟提问题的人一样不知道问题的谜底，你就能够这样说。

e.g. Do you think we will be able to book the restaurant for Friday? Your guess is as good as mine.
例句：你觉得咱们能在周五预约到这家餐厅吗？我跟你一样不知道。

6. Not as far as I know

We use this to say that something may be true, but you do not have enough information to know whether it is or not.
当你认为某件事可能是真的但又一直定的情况下，可能用这个表白。

e.g. Has Clive left the company? I haven’t seen him 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?我很久都没见到他了。 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 or understand something. "It" is often left out.
这是一种表白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? It beats me
例句：他怎么会做这种蠢事？ 不知道啊。