Modal Verb: Must

Modal verbs used to show obligation or prohibition are

• should

• must

• musn't

• shouldn't

Modal verbs used to give advice and recommendation or to express a duty to do something are

• should

• must

• musn't

• shouldn't

2- In class, we mustn´t:

• study

• pay attention

• shout

• work

4- In class, you must:

• Listen carefully

• Shout

• Talk

• Sleep

5- How do you say: "Tú no debes usar el móvil en el hospital"?

• You mustn´t to use mobile phone in the hospital

• You musn´t using mobile phone in the hospital

• You must use mobile phone in the hospital

• You musn´t use mobile phone in the hospital

7- On the grass:

• You must walk

• You must to walk

• You mustn´t walk

• You mustn´t walking

8- In the library, you must:

• shout

• talk

• be quiet

• walk

10- You have an Science exam

• You must dance

• You must go to the disco

• You must study

• You must to study

Use MUST NOT (mustn't) to express

• obligation.

• necessity.

• lack of obligation.

• prohibition.

1.You ________ listen to your teacher.

• must

• mustn´t