Great! I’m under 12! I don’t have to pay!
Great! No school today – I don’t have to get up early.
OK, you can keep it – but it mustn’t leave this room!
You really must see that film! It’s great!
My parents don’t have to go to work tomorrow because it’s a public holiday.
My sister mustn’t go to school yet because she’s only three!
Hurry up! We mustn’t be late again.