1) (-) Nick doesn't play tennis in the summer (?) Nick plays tennis in the summer?
2) (-) Yesterday he was not very upset (?) Was he really upset yesterday?
3) (-) She will not study well (?) She will study well?
4) (-) My mom won't cook dinner at 8 o'clock (?) Will my mom cook dinner at 8 o'clock?
5) (-) They didn't live in a hostel (?) Did they live in a hostel?
6)(-) My friends are not going to vacation in the south (?) Are my friends going to vacation in the south?