Must / Have to / Should

I ___________ study if I want to get the scholarship.

• have to

• must

• should

• has to

You __________ go to the doctor.

• must

• have to

• has to

• should

I __________ talk to her before she leaves.

• have to

• must

• has to

• should

You __________ eat chocalate. You are allergic!

• should

• don't have to

• shouldn't

• mustn't

Visitors __________ feed the animals in the zoo. It's forbidden!

• mustn't

• shouldn't

• don't have to

• doesn't have to

"Should" can be used for obligations.

• True

• False

She _________ go by bus because she doesn't have a car.

• must

• have to

• has to

• should

"Must and have to" can be used for expressing advice.

• True

• False

You _________ watch this movie. It's very funny.

• hast to

• must

• should

• musn't

"Have to" is more common in written English than in spoken English.

• True

• False