2 I have to wear uniform at school but Jack doesn't have to do so.
3 I have to go to music school but Jack doesn't have to go to music school.
4 I have to prepare for tests but Jack doesn't have to prepare for tests.
5 I have to be polite to teachers but Jack doesn't have to be polite to teachers.
6 I have to do homework but Jack doesn't have to do homework.
7 I have to get up early but Jack doesn't have to get up early.