Lesson 1 - Grammar - SPORTS AND RECREATION - Page2
MUSTN’T and DON’T HAVE TO
These negative forms have completely different meanings. You mustn’t do something means that you are not allowed to do it; you can’t do it.
You’re ill. You mustn’t smoke!
This is a dangerous area. You mustn’t walk alone!
You don’t have to means that there is no need for you to do it but you can if you want to.
You don’t have to take a taxi. I can take you home.
I don’t have to go to work tomorrow.
You don’t have to call me every day.