We must bring food from home.
We don't have to buy food or drinks at the cafe.
We have to buy food and drinks at the cafe.
We are 15. We can't come with parents.
We are 15. We have to come with our parents.
We are 15. We don't have to come with our parents.
I have to eat a burger.
I have to eat a sandwich.
I don't have to eat a burger if I don't want it.
You have to cross the road here.
You have to cross the road in a different place.
You can cross the road here.
We can come to school after 9.00 if we want. It's OK.
We have to be at school before 9.00.
We don't have to be at school before 9.00.
We have to wear shorts to our PE lessons.
We don't have to wear shorts to our PE lessons.
We have to wear trousers to our PE lessons.
We have to go to the park.
We have to stay at home.
We don't have to go to the park.
Tom can wear uniform to school.
Tom has to wear uniform to school.
Tom doesn't have to wear uniform to school.
I can't do my homework tomorow.
I can do my homework tomorrow.
I have to do my homework tomorrow.
We can go to bed after 10 p.m.
We don't have to go to bed before 10 p.m.
We have to go to bed before 10 p.m.
We don't have to walk our dog on a leash.
We have to walk our dog on a leash.
We can walk our do on a leash or without it.
She has to cook breakfast on Sunday mornings.
She can cook breakfast on Sunday mornings if she wants.
She doesn't have to cook breakfast on Sunday mornings.