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English - use of have to, don't have to, must and mustn't

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Oscar Alvarez
Oscar Alvarez

Use of have to and must and examples

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ADULTS IV UNIT 5C have to, don¡¯t have to, must, mustn¡¯t
MUST / MUSTN¡¯T + She must tidy her room before she goes out. - You mustn¡¯t smoke in class Use must+infinitive to talk about rules and obligations. Use mustn¡¯t+infinitive to say something is prohibited.
HAVE TO / DON¡¯T HAVE TO + She has to get up at 7.oo everyday. - He doesn¡¯t have to work on Saturdays. Use have to+infinitive to talk about rules and obligations, or to say something is necessary. Use don¡¯t have to+infinitive to say there is no obligation, or something is not necessary.
1) Don¡¯t contract have or has. I have to go. NOT I¡¯ve to go. 2) Must and have are very similar, but there is a small difference. We normally use have to for a general obligation (a rule at work). We normally use must when the speaker imposes the obligation.
Choose the correct option ?You ¡­.. smoke in this room. A) Must B) Mustn¡¯t C) don¡¯t have to
Choose the correct option ?I ¡­. do my homework. A) Must B) Have to C) don¡¯t have to
Choose the correct option ?We ¡­. be quiet. A) Must B) mustn¡¯t C) don¡¯t have to
Choose the correct option ?You ¡­. make noise in this area. A) Must B) mustn¡¯t C) don¡¯t have to
Choose the correct option ?You ¡­. put the rubbish into the bin. A) Must B) mustn¡¯t C) don¡¯t have to
Choose the correct option ?You ¡­. Take photos in this museum. A) Have to B) mustn¡¯t C) don¡¯t have to
Choose the correct option ?You ¡­. speak on the phone on an aeroplane. A) Have to B) mustn¡¯t C) don¡¯t have to
Choose the correct option ?You ¡­. swim in this river. It¡¯s dangerous. A) Have to B) mustn¡¯t C) don¡¯t have to
Choose the correct option ?The traffic light is red. You ¡­. stop! A) Have to B) must C) don¡¯t have to
MODIFIERS ? (They modify the adjective). Learning Chinese is incredibly difficult!

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English - use of have to, don't have to, must and mustn't

  • 1. ADULTS IV UNIT 5C have to, don¡¯t have to, must, mustn¡¯t
  • 2. MUST / MUSTN¡¯T + She must tidy her room before she goes out. - You mustn¡¯t smoke in class Use must+infinitive to talk about rules and obligations. Use mustn¡¯t+infinitive to say something is prohibited.
  • 3. HAVE TO / DON¡¯T HAVE TO + She has to get up at 7.oo everyday. - He doesn¡¯t have to work on Saturdays. Use have to+infinitive to talk about rules and obligations, or to say something is necessary. Use don¡¯t have to+infinitive to say there is no obligation, or something is not necessary.
  • 4. 1) Don¡¯t contract have or has. I have to go. NOT I¡¯ve to go. 2) Must and have are very similar, but there is a small difference. We normally use have to for a general obligation (a rule at work). We normally use must when the speaker imposes the obligation.
  • 5. Choose the correct option ?You ¡­.. smoke in this room. A) Must B) Mustn¡¯t C) don¡¯t have to
  • 6. Choose the correct option ?I ¡­. do my homework. A) Must B) Have to C) don¡¯t have to
  • 7. Choose the correct option ?We ¡­. be quiet. A) Must B) mustn¡¯t C) don¡¯t have to
  • 8. Choose the correct option ?You ¡­. make noise in this area. A) Must B) mustn¡¯t C) don¡¯t have to
  • 9. Choose the correct option ?You ¡­. put the rubbish into the bin. A) Must B) mustn¡¯t C) don¡¯t have to
  • 10. Choose the correct option ?You ¡­. Take photos in this museum. A) Have to B) mustn¡¯t C) don¡¯t have to
  • 11. Choose the correct option ?You ¡­. speak on the phone on an aeroplane. A) Have to B) mustn¡¯t C) don¡¯t have to
  • 12. Choose the correct option ?You ¡­. swim in this river. It¡¯s dangerous. A) Have to B) mustn¡¯t C) don¡¯t have to
  • 13. Choose the correct option ?The traffic light is red. You ¡­. stop! A) Have to B) must C) don¡¯t have to
  • 14. MODIFIERS ? (They modify the adjective). Learning Chinese is incredibly difficult!