XII MM1 Obligation ( Must, Have to, dan Should)

I _________ clean my room. It is so dirty

• Must

• Mustn't

• Have to

• Don't have to

You look tired. You ... go to bed.

• must

• should

• had to

• has to

You're cold. You ... wear a coat.

• should

• must

• shouldn't

• mustn't

Which of the following modals indicates strong obligation?

• must

• mustn't

• should

• have to

You .................... wear a helmet when you ride your bike. It’s the law.

• should

• must

• ought to

• have

We use HAVE TO for...

• personal obligations

• general obligations

• ideas

• thoughts

All employees ________ be on time for work.

• Must

• Mustn't

• Have to

• has to

She ...... wear a uniform because she's a police officer

• HAVE TO
• HAS TO
• HAD TO
• DOESN'T HAVE TO

We use must/mustn't to express:

• obligation or duty, very strong advice, prohibition 
• prohibition
• necessity
• lack of necessity

We use should/shouldn't to:

• refuse a permission
• give advice
• ask for permission
• express necessity