- It was a mistake to tell him.
- Such a mistake would perhaps lead to disastrous consequences.
- I found a mistake in this quotation.
- Do not try to cover a mistake.
- I made a mistake that can not be rectified.
- I made a mistake and I will assume responsibility for it.
- That's our number, but you have make a mistake.
- You made a mistake; I am not Jane but Joan.