Переделать предложение в вопросительную и отрицательную sam answered well at the seminar. we met when we were on holiday. the pupils asked a lot of questions in class

Did Sam answer well at the seminar?
Did we meet when we were on holiday?
Did the pupils ask a lot of questions in class?
Sam did not answer well at the seminar.
We did not meet when we were on holiday.
The pupils did not ask a lot of questions in class