Saying you don't know - Elementary

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:

How To Use These Phrases In Your English:

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.
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).
Phrases 6 and 7 are saying (more strongly) that you don't know anything about the topic.
If you say phrases 8 or 9, you are probably a little angry that somebody asked you a question about this topic.
Phrase 10 is showing stronger annoyance that somebody asked you about a certain topic.

Elementary