Modal verbs (obligation/prohibition/advice/permi ...

I’m not sure if we (3) can/have to wear make-up at all.

‘Do you know much about psychology?’ ‘I don’t, but you ____ ask Tom’s mother, she’s a university professor.’

‘His essays are copied off the Internet.’ ‘He ____ do that. That’s called plagiarism.’

‘I forgot we had a biology test today.’ ‘You ought ____ check the timetable next time.’

Here we (1) don’t have to/have to wear a uniform, which is great because I dislike them, but we (2) can/can’t wear shorts or things like that.

‘My computer has crashed again! Can you fix it?’ ‘Well, I can try, but you’d ____ ask a computer technician.’

Of course, we (5) mustn’t/don’t have to use them to text each other or surf the web.

Like in my old school, attendance is important and we (6) mustn’t/must be late.

‘I have to do an assignment on Romeo and Juliet, but I haven’t read it yet.’ ‘Well, you ____ to start now if you want to get a good mark.’

The amazing thing is that we (4) don’t have to/can use mobile phones in class – but only with the teacher’s permission

‘She’s going to do business studies when she finishes school.’ ‘I don’t think she ____, she doesn’t like maths.’