Saying you don't know

Sometimes somebody asks you a question and you don't know the answer. Here are some phrases that you can use when you don't know.

10 expressions to Use In Speaking And Writing: 
  1. Sorry. I don't know.
  2. (I'm afraid,) I've no idea.
  3. (Sorry,) I can't help you there.
  4. I don't know anything about..(cars)
  5. I don't know the first thing about (cars)
  6. I haven't got a clue.
  7. Search me.
  8. Don't ask me.
  9. What are you asking me for?
  10. How the hell should I know?
How To Use These Phrases In Your English: 
  1. In phrases 1, 2 and 3 we can use either 'sorry' or 'I'm afraid' or we can leave this part of the pharse out. These phrases are quite polite.
  2. Phrases 4 and 5 are saying that you don't know the answer and that you don't know about the whole topic area (cars).
  3. Phrases 6 and 7 are saying (more strongly) that you don't know anything about the topic.
  4. If you say phrases 8 or 9, you are probably a little angry that somebody asked you a question about this topic.
  5. Phrase 10 is showing stronger annoyance that somebody asked you about a certain topic.
Intermediate