You ... drive so fast; we have a lot of time
must
musting
don't have to
We .... leave now; it's 10 and the conference doesn't start until 12.
must
mustn't
haven't to
Teacher: "You ... arrive on time for class"
mustn't
don't have to
must
Do you ..... work at night? This is a day off.
mustn't
must
have to
I .... be late. It's the most important meeting of the year.
don't have
musting
mustn't
You ... tell anyone; it's a secret.
don't have to
having to
mustn't
You ... do something to solve this problem
must
musting
don't have to
You .... apologise, it isn't necessary
must
must not
don't have to
The doctor has put me on a strict diet. I .... eat more fruit and vegetables and do more exercise.
don't have to
must
musting
You ..... tell the boss what happened, or he'll fire you.
mustn't
have not to
have to
You ... go now; you can stay a bit longer
musting
have to
don't have to
You .... put salt in her food; the doctor said she can't eat salt.
mustn't
haveing
haven't
We ... cook more; there's enough food
must
don't have to
having to
Visitors in the zoo .... feed the animals.
have to
don't have to
mustn't
You ... smoke here; smoking is not allowed.
mustn't
have to
don't have to
I don't like these clothes, but I ... wear them at work.
have to
having to
must