The document discusses the different uses of modal verbs including can, could, may, must, have to, and be able to. It explains that can and can't express ability or inability in the present, while could and couldn't are used to express ability or inability in the past. May expresses possibility or asks/gives permission formally. Must expresses obligation and mustn't expresses prohibition.
The document discusses the different uses of modal verbs including can, could, may, must, have to, and be able to. It explains that can and can't express ability or inability in the present, while could and couldn't are used to express ability or inability in the past. May expresses possibility or asks/gives permission formally. Must expresses obligation and mustn't expresses prohibition.
The document discusses the different uses of modal verbs including can, could, may, must, have to, and be able to. It explains that can and can't express ability or inability in the present, while could and couldn't are used to express ability or inability in the past. May expresses possibility or asks/gives permission formally. Must expresses obligation and mustn't expresses prohibition.
The document discusses the different uses of modal verbs including can, could, may, must, have to, and be able to. It explains that can and can't express ability or inability in the present, while could and couldn't are used to express ability or inability in the past. May expresses possibility or asks/gives permission formally. Must expresses obligation and mustn't expresses prohibition.
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Used to:
Express ability / inability in the present
e.g. They can / can’t run very fast.
Ask / give / refuse permission
e.g. Can I borrow your collar? Yes, you can. / No, you can’t. Used to:
Express ability / inability in the past
e.g. They could / couldn’t bark very loud when they were puppies.
Ask permission politely / Make polite
requests e.g. Could I sit down here please? e.g. Could I have some more food please? Used to:
Express possibility e.g. They may bite you.
Ask / give / refuse permission (formal)
e.g. May I have a snack? Yes, you may / No, you may not. Used to:
Must – Express obligation.
e.g. They must go home.
Mustn’t – Express prohibition.
e.g. They mustn’t smoke in here. Underline the correct option. 1. I can / must go to the doctor. I’m feeling ill. 2. You could / may open your books. 3. May / Must I have some more tea? 4. They can’t / mustn’t give alcohol to the animals. 5. That collar is too expensive. We can’t / may not buy it. 6. You must / mustn’t be home by 10 o’clock. I’ll be waiting for you. 7. I’m afraid I may not / can’t go to the dentist with you. 8. May / Can I take your dog to the vet? 9. I’ve already told you! You can’t / couldn’t eat any more sweets! 10. Yes, you may / must go out with your friends. Complete the sentences with the correct Modal Verb. 1. You ….. pull the dog’s tail. 2. ….. you help me with this dog food? 3. She ….. Run very fast when she was 4 years old. 4. ….. I open the window, please? 5. ….. you pass the milk, please? 6. You ….. close the door! Let the dogs come in! 7. You ….. do better if you weren’t so lazy. 8. He is very strong! He ….. lift very heavy objects. 9. You ….. go to bed so late! It’s bad for you! 10. ….. I correct the exercise, teacher? ABILITY / INABILITY • CAN / CAN’T = present • COULD / COULDN’T = past • BE ABLE TO = all other tenses
• I can drive a car but I can’t ride a motorbike.
• When I was 6, I could swim very well but I couldn’t ride a bike. • In two years I will be able to drive a car.