CAN He can find any street in London.You can take a taxi.Can you take me to the airport?

AbilitySuggestionRequest

BE ABLE TO He is able to find any street in London.

Ability

CAN´T That story can´t be true

Certainty that something isimpossible

COULD I could play tennis when I was younger.Could you take me to Victoria Station?.You could take a taxi.

AbilityRequestSuggestion

MIGHT It might be quicker to travel by train

Possibility

MUST You must be back at 10 o´clock.Look at the snow. It must be cold outside.

ObligationCertainty that something is true

HAVE TO You have to be back at 10 o´clock.

Obligation

NEED TO You need to study a lot.

Obligation

NEEDN´T You needn´t have a university degree.

Lack of obligation

MUSTN´T You mustn´t drive without a license.

Prohibition

DON´T HAVE TO

You don´t have to call a taxi.

Lack of obligation

SHOULD You should drive more carefully

Opinion / Advice

OUGHT TO You ought to drive more carefully

Opinion Advice

PRACTICE

1. Laila ………………….. not swim when she was one year old.

2. …………………. I borrow your pen?3. You look tired, you ………………have some sleep.4. I …………………. To study well for the exam.5. My friends……………. Come to the party, but

nobody is sure.6. The project……………….. Finish in two years

time.7. It……………. rain in the desert sometimes, but

you can’t depend on it.

8. You …………….. behave well in front of guests, stop being silly.

9. I wish I ………………… buy a new car but I don’t have any money.

10. If I had enough money, I ………..travel with my friends but now I can’t.

11. Samy…………lift that heavy table, he is too weak.

12. You failed in your final test, you…………..have studied harder.

• 13. I have no time. I …………….leave home now. My parents are waiting for me.

• 14. We …………… (not) climb those mountains when we were kids.

• 15.Stop smoking! You really ………… (not) smoke.

• 16. You …………..leave the class before one o’clock.

• 17. We ………….. watch TV so much.

• 18. He ……………. be friendly, but he is usually unfriendly.• 19. It’s too cold! I ………….. close

the window.• 20. You …………………. run faster if

you weren’t so lazy.