I SHOULDN'T/ OUGHT TO pack my bags! We are leaving in an hour!
OUGHT TO
The plain leaves at 5pm, but we MUSTN'T/ DON'T HAVE TO BE in the airport before 3 pm.
DON'T HAVE TO
DO we HAVE TO / SHOULD we get a visa to the USA?
DO we HAVE TO
I am going to China soon . I MUST/ DON'T HAVE TO download a guidbook.
MUST
You can never find your pasport. You SHOULD / SHOULDN'T put it in a safe place!
SHOULD
It s going to be very hot at the beach. We MUSTN'T/ MUST forget to take our sun cream.
MUSTN'T