a) 1 have to
2 has to
3 has to
4 have to
5 have to
6 have to
7 has to
8 has to
9 have to
10 has to
b) 1 doesn’t have to
2 don’t have to
3 doesn’t have to
4 don’t have to
5 doesn’t have to
6 don’t have to
7 doesn’t have to
8 don’t have to
9 don’t have to
10 doesn’t have to
c) 1 Does Peter have to
2 Do Sue and Joan have to
3 Do I have to
4 Do you have to
5 Does she have to
6 Does your mum have to
7 Do you have to
8 Do they have to
9 Does Carla have to
10 Do Carla and Mat have to