Grammar - must/ mustn't, needn't/ don't have to

We use ​ (a)   to say that something is ​ (b)   or very important to do.

• must
• necessary
• mustn't
• important

We use​ (a)   to say that something is ​ (b)   (a negative order).

• mustn't
• prohibited
• needn't
• necessary

We use​ ​ (a)   or ​ (b)   to say that something is not necessary.

• needn't
• don't have to
• must
• mustn't

You ​ (a)   finish your breakfast or you will be hungry later.

• must
• mustn't

I ​ (a)   leave before 8.30 or I'll be late for school.

• must
• mustn't

You ​ ​ (a)   eat that bread. It's a week old!

• mustn't
• must

In football, you ​ (a)   touch the ball with your hand.

• mustn't
• must

You ​ (a)   visit Paris some time. It's a wonderful city.

• must
• mustn't

You ​ (a)   go near the edge of the cliff. It's very dangerous.

• mustn't
• must

You ​ (a)   take off your shoes if they are clean.

• needn't
• must
• mustn't