Should, Must, Have to

What do we use 'have to' for?

• to give advice

• to say that it's necessary to do something

• to express a possibility

• to talk about rules

What do we use 'must' and 'mustn't' for?

• to say that it's necessary to do something

• to give advice

• to talk about rules

• to express a possibility

What do we use 'should' and 'shouldn't' for?

• to say that it's necessary to do something

• to give advice

• to talk about rules

• to express a possibility

What do we use 'don't have to' for?

• to say that it's not necessary to do something

• to give advice

• to talk about rules

• to say that it's not possible to do something

What is the negative form of 'MUST'?

• CAN'T

• MUST NOT
• MUSTN'T

• CANNOT

Complete the sentence: I _______ finish my homework before I can go out to play. (use 'have to' or 'must')

• need to

• have to

• should

• can

Complete the sentence: You _______ talk during the exam.

• might

• should

• mustn't

• can

Complete the sentence: We _______ wear a uniform to school.

• should

• can

• don't have to

• must

Complete the sentence: She _______ forget to buy milk on her way home.

• can

• might

• mustn't

• should

Complete the sentence: We _______ arrive at the airport two hours before the flight.

• should

• can

• don't have to

• must