1. 1 do we have to / must we
2 can
3 may / might
4 might / could
5 couldn’t / weren’t able to
6 must
7 have to
8 should / ought to
9 should / might
2. 1 must have got
2 must make, don’t have to leave
3 must have known
4 must be
5 can’t have had
6 shouldn’t / oughtn’t to interfere
3. 1 That must be Andy’s brother – he’s the spitting image of him.
2 You must have been over the moon when you were picked for the team.
3 I shouldn’t be late home this evening.
4 I might / may not go to the firework display.
5 He ought to / should apologise to the teacher.
6 I should have put on more sun cream.