Obligation and Prohibition

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

Children ................ (not) say rude words.

• must

• have to

• mustn't

• don't have to

I ............... clean the house after the party last week.

• must

• have to

• mustn't

• don't have to

Notice in the museum:

People ................... (not) touch exhibited paintings.

• mustn't

• can't

• must

• have to

There are no stamps. I .............. buy some at the post office.

• must

• have to

• mustn't

• don't have to

No body was hungry, so I ............... (not) cook anything.

• can't

• must

• mustn't

• have to

What will you do if:

Your teacher ask you to submit your homework tomorrow.

• I must do my homework now

• I have to do my homework now

• I can't do my homework now

• I mustn't do my homework now

What will you do if:

You meet your friend in the market.

• I have to greet my friend

• I must greet my friend

• I mustn't greet my friend

• I don't have to greet my friend

What will you do if:

You got a bad score in the test

• I have to study harder

• I must study harder

• I mustn't study hard

• I don't have to study hard

What will you do if:

Your mother always tells you to clean your own shoes.

• I must clean my own shoes

• I have to clean my own shoes

• I mustn't clean my own shoes

• I can't clean my own shoes