1. They are not discussing their performance.
Are they discussing their performance?
2. I am not going to have a test in English.
Are you going to have a test in English?
3. I play the piano perfectly.
I don't play the piano perfectly.
Do you play the piano perfectly?
4. Sometimes we didn't have music lessons in a great hall.
Did you sometimes have music lessons in a great hall?
5. We didn't have lunch at work.
Did you have lunch at work?