1. Have to & Have got to

2. 1. Use have (got) to in the affirmative/positive form to talk about an obligation, or something that is necessary to do. Have (got) to is always followed by a verb. Have to and have got to have the same meaning and can be used interchangeably. Have (got) to is always followed by a verb. Have to and have got to have the same meaning and can be used interchangeably. We have to go to school tomorrow. Or We have got to go to school. We have to go to school tomorrow. Or We have got to go to school.

3. 2. For the negative Use don’t and doesn’t with have to. We don’t have to go to school tomorrow! Yay! She doesn’t have to start her new job until May 9th. X: She hasn’t got to start her new job until May 9th. We don’t have to go to school tomorrow! Yay! She doesn’t have to start her new job until May 9th. X: She hasn’t got to start her new job until May 9th.

4. Pay attention Don't have to means that there isn't any obligation at all, there is no need to do it. Don't have to is different from shouldn't and mustn't. You don't have to go with me. (You can go with me if you want to.) You shouldn't smoke. (It is bad for your health.) Don't have to means that there isn't any obligation at all, there is no need to do it. Don't have to is different from shouldn't and mustn't. You don't have to go with me. (You can go with me if you want to.) You shouldn't smoke. (It is bad for your health.)

5. 3. Use do/don’t and does/doesn’t in a question. Do you have to go to school tomorrow? Does she have to work tomorrow? X: Have you got to go to school tomorrow?

6. 4. Have to can be used in the simple past: He had to spend $2,000 to repair his car after the accident. The question Did he have to spend $2,000 to repair his car after the accident.

7. http://www.eclecticenglish.com/grammar/HaveTo1A.html

8. Modal verbs The modal verbs include can, must, may, might, will, would, should. They are used with other verbs to express ability, obligation, possibility, and so on.

9. ModalMeaningExample canto express abilityI can speak a little Russian. canto request permissionCan I open the window? mayto express possibilityI may be home late. mayto request permissionMay I sit down, please? mustto express obligationI must go now. mustto express strong belief She must be over 90 years old. shouldto give adviceYou should stop smoking. wouldto request or offer Would you like a cup of tea? wouldin if-sentences If I were you, I would say sorry.

10. Rules of the modal verbs Modal verbs are unlike other verbs

11. He can sing very well I can go to school by bicycle He can sing very well I can go to school by bicycle 1.The form is the same for all persons.there is no –s in the third person singular

12. You must stop when the traffic lights turn red You should see the doctor You must stop when the traffic lights turn red You should see the doctor 2. Modal verbs are followed by an infinitive without "to"

13. Can she drive ? Should I go home? Can she drive ? Should I go home? 3. There is no do/does in the question

14. You mustn’t steal. I can’t swim. It won’t rain tomorrow. You mustn’t steal. I can’t swim. It won’t rain tomorrow. 4. To form negative add n’t. There is no don’t/doesn’t Will not = won’t 4. To form negative add n’t. There is no don’t/doesn’t Will not = won’t

15. I could swim when I was three. 5. Most auxiliary verbs refer to present and future Only ( can ) has a past tens, ( could) 5. Most auxiliary verbs refer to present and future Only ( can ) has a past tens, ( could)