2b 1. You DON'T HAVE TO go into that room while the paint is drying or you'll get paint on you.
needn't
should
mustn't
3. It’s a public holiday tomorrow, so the office is closed and we MUSTN'T go to work.
must
have to
don’t need to
2a 2. We needn’t do this by the end of the day.
It's necessary.
It's not necessary.
2a 3. You shouldn't go out without a coat.
It’s not necessary.
It’s not a good idea.
1. should practise speaking 2. don't have/need to be 3. shouldn't spend hours studying 4. should study 5. have to/need to/should/must 6. don't have/need to
2a 6. You don’t have to sit there.
It's not necessary.
It's not allowed.
2. You MUST TO see a doctor if you're not feeling well.
mustn't
should
don’t have to
4. You SHOULDN'T wear a suit if you don’t want to.
mustn't
must
needn't
2a 4. We don’t need to go out later.
It’s not necessary.
It’s not a good idea.
2a 1. I have to finish this report by 5 p.m.
It's necessary.
It's not necessary.
2a 5. You mustn't put your foot on the seat.
It's not allowed.
It's not necessary.