Advice, should, shouldn't, ought to, had better, and had better not
Must, have to, mustn't, don't have to
1. MUST (simple present only)
order, law, moral obligation,suggestion
he must stay in prison for stealing money to the
lady!
You mustn’t stop here, sir!
You must tidy your room before watching
t.v.!
The new shop is great! You must visit it!
2. Have to: necessity, rule
All children have to wear a uniform
You have to show your mother your test
You have to cross the road on the zebra
crossing
3. Don’t have to: not necessary
You don’t have to go jogging every day,
but you can if you want!
You don’t have to help me in the
houseworks! You’d better go out with
your friends!
