2) doesn't have to
3) don't have to
4) have to
5) has to
6) doesn't have to
7) mustn't
8) must
2doesn't have to
3don't have to
4have
6doesn't
7mustn't
8must
2) doesn't have to
3) don't have to
4) have to
5) has to
6) doesn't have to
7) mustn't
8) must
2doesn't have to
3don't have to
4have
6doesn't
7mustn't
8must