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HAVE TO
 We use have to to talk about strong obligation that
  comes from somewhere else, for example from you
  boss, yo...
HAVE TO
AFFIRMATIVE
                 SUBJECT     MODAL     VERB        EXAMPLES
SENTENCES
                                ...
DON’T HAVE TO
   Don't have to means that there isn't any obligation at all,
    there is no need to do it.
   Don't hav...
DON’T HAVE TO
  NEGATIVE
                   SUBJECT      MODAL          VERB       EXAMPLES
 SENTENCES

                  ...
INTERROGATIVE FORM
QUESTIONS   DO     SUBJECT   MODAL     VERB          EXAMPLES

                                        ...
EXERCISES (THE SECRETARY)
Read the advertisement, then choose the correct words below.
Help Wanted: Secretary. No experien...
EXERCISES (THE SECRETARY)
                                                 have to
5. The secretary also ___ answer the co...
EXERCISES (THE HEALTH)
                                                             have to
                              ...
Have to and_dont_have
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Have to and_dont_have

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uses of have and don´t have to

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Have to and_dont_have

  1. 1. HAVE TO  We use have to to talk about strong obligation that comes from somewhere else, for example from you boss, you parents, a rule at school or work.  Examples: I have to be home by ten. (My parents told me so.) I must be home by ten. I have a very difficult day tomorrow. (It is my own decision.) I have to get up early, because I start work at 8. (It is a rule.) I should get up early. (Now I stay in bed until lunchtime.)
  2. 2. HAVE TO AFFIRMATIVE SUBJECT MODAL VERB EXAMPLES SENTENCES I have to clean my room. You have to get I a new book. affirmative you We have to have to clean sentences we pick up the get (+) they laundry. pick up They have to NECESSITY: have have a have to/has to eat notebook. means it is go work He has to eat necessary. he dinner now. she has to She has to go it to work now. It has to work.
  3. 3. DON’T HAVE TO  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.  Examples: I don't have to get up early at weekend. (I can stay in bed as long as I want.) You mustn't tell lies. (It is very bad to tell lies.) 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.) ** We do not use have to when we talk about what is a good idea to do, but we don't do it yet. Instead, we use should
  4. 4. DON’T HAVE TO NEGATIVE SUBJECT MODAL VERB EXAMPLES SENTENCES I don't have to negative work on Saturday. sentences I You don't have to (-) you do that. don't have to we work We don't have to LACK OF they do clean the car. NECESSITY: clean They don't have to don't have eat eat pizza. to/doesn't have work go He doesn't have to be to work tomorrow. means it is not he She doesn't have necessary. she doesn't have to to go today. You have a it It doesn't have to choice. be that way.
  5. 5. INTERROGATIVE FORM QUESTIONS DO SUBJECT MODAL VERB EXAMPLES Do I have to clean my room? I Do you have to get a you new book? Do we clean Do we have to pick they get up the laundry? pick up Do they have to have questions have to have a notebook? (?) eat go Does he have to eat work dinner now? he Does she have to go Does she to work now? it Does it have to work?
  6. 6. EXERCISES (THE SECRETARY) Read the advertisement, then choose the correct words below. Help Wanted: Secretary. No experience necessary. Must type 50 words per minute. Work Monday-Friday, weekends off. Answer phones, use computer, file reports. have to has to 1. The secretary ___ know how to type. don't have to doesn't have to have to has to 2. A secretary ___ be a woman. The secretary can be a man. don't have to doesn't have to Do / have to Does / have to 3. ___ the secretary ___ work Saturdays? Do / has to Does / has to have to has to 4. No, he/she ___ go to work on saturdays. don't have to doesn't have to
  7. 7. EXERCISES (THE SECRETARY) have to 5. The secretary also ___ answer the company's has to phones.... don't have to doesn't have to have to has to 6. ...and he/she ___ file reports every week. don't have to doesn't have to Do / have to Does / have to 7. ___ the secretary ___ use a computer? Do / has to Does / has to have to has to 8. Yes, He or she ___ use a computer. don't have to doesn't have to
  8. 8. EXERCISES (THE HEALTH) have to has to 9. People ___ eat food to stay alive. don't have to doesn't have to have to 10. People ___ eat pizza and candy to stay alive. They can has to choose healthy food. don't have to doesn't have to have to has to 11. A person ___ drink water to stay alive. don't have to doesn't have to have to has to 12. A person ___ smoke cigarettes to stay alive. don't have to doesn't have to

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