1. (-) Mai doesn't play badminton after school.
(?) Does Mai play badminton after school?
2. (-) She is not outing at the moment.
(?) Is she outing at the moment?
3. (-) We often don't have picnic on weekends.
(?) Do we often have picnic on weekend?
4. (-) The students are not sitting in class.
(?) Are the students sitting in class?