1 They are not at the seaside.
2 She is not my classmate.
3 I can not swim underwater.
4 Bob must not go there.
5 They don't walk to school.
6 He doesn't travel by train.
7 Bill doesn't do morning exercise.
8 We don't go fishing at night.
9 I don't have a lot of work to do.
10 Helen doesn't have Music once a week.