Must for obligation

You ______ drive a car with a belt.

• MUSTN'T

• MUST

• SHOULD

You __ swim here. It's forbidden.

• must

• mustn't

• don't have to

You ___________ read this book. It’s really good.

• MUST

• MUSTN'T

• HAVE TO

• DON'T HAVE TO

The windows are very dirty. I …………………….. clean them.

• MUST

• MUSTN'T

• WILL

• SHOULDN'T

There's a sign that prohibits diving in the pool, so you ____ not do it!

• must

• have to

• can

• should

Which modal do you use to express inner obligation?

• can
• should
• have to
• must

You _______ read the washing machine instructions carefully or you will ruin your clothes.

• SHOULD

• MUST

• MUSTN´T

We use must to...

• State a rule

• Give advice

• Suggest a good idea

• Express ability

All employees ________ on time for work.

• must be

• have to

• mustn´t

You ... do your homework as soon as you leave school. I don't want you to be lazy.

• must

• have to

• mustn't

• can't