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Modals of obligation: must / have to
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You ________ apologise; it isn't necessary
don't have to
Oops!
Okay!
Mike can't come to the park. He _________ help with the housework
has to
Oops!
Okay!
You _______ put salt in her food; the doctor said she can't eat salt.
mustn't
Oops!
Okay!
I _________ wear a tie; I do it because I like wearing them.
don't have to
Oops!
Okay!
It's getting late. I _______ go home now!
must
Oops!
Okay!
All employees ________ be on time for work.
have to
Oops!
Okay!
I _________ be late. It's the most important meeting of the year.
mustn't
Oops!
Okay!
You ________ keep your room clean
must
Oops!
Okay!
Children __________ wear a uniform in many schools
have to
Oops!
Okay!
You _________ smoke in here; smoking is not allowed.
mustn't
Oops!
Okay!
I _____ leave early because I wasn't feeling well.
had to
Oops!
Okay!
You ________ go now; you can stay a bit longer.
don't have to
Oops!
Okay!
Visitors to the zoo________feed the animals.
mustn't
Oops!
Okay!
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