Must and musn't, have to and don't have to

Doctors _________ have clean hands.

• must

• don't have to

• should

My mom _______ work in an office.

• don't have to

• haven't to

• doesn't have to

_________ study hard at school?

• Do you has to

• Do you have to

• Does you have to

What word do you use to say something is FORBIDDEN?

• Have to

• Must

• Mustn't

What words do you use to say something is not necessary?

• Have to / Has to

• Don't have to / Doesn't have to

• Should

What words do you use to say something IS NECESSARY?

• Should

• Must / Have to / Has to

• Mustn't

Carl ____________ study hard to pass his exams.

• have to

• has to

• mustn't

We __________ arrive on time for our graduation day!

• mustn't

• shouldn't

• must

_________ do chores at home?

• Do you have to

• Does you have to

• Should

What training _____________ receive?

• do a pilot have to

• does a pilot have to

• should a pilot has to