Modal verbs

Modal verbs

1. It's a type of auxiliary verb that expresses:

   • possibility
   • necessity
   • obligation

2. NEED TO

   • obligation
     • you need to study a lot
   • lack of obligation
     • you needn't have a university degree

3. structure

   • SUBJECT
     • I, she, he, it, we, they, you,
       • LAURA MILENA PINZÓN TUTA
   • MODAL VERB
     • must, can, should, may, should
   • MAIN VERB
     • do, be, prepare...)
   • RULES
     • Most of modal verbs can't be used in past/future tense
     • In third person present tense modals don't have -s ending
     • Use "not" to make modals negative

4. CAN

   • ability
     • he can find any Street in London
   • asking for permission
     • can I go there?
   • request
     • can you help me?

5. COULD

   • permission
     • could I borrow your pen?
   • request
     • could you say it again more slowly?
   • posibbility
     • we could have another chance
   • future
     • I wish I could meet her next week
   • ability
     • he could play the piano when he was 6

6. MAY

   • posibbility
     • it may be quicker to travel by train
   • permission
     • may I come in?

7. MIGHT

   • possibility
     • it might to be quicker to travel by train

8. MUST

   • obligation
     • you must be back at 10 o'clock
   • certainty that something is true
     • look at the snow. It must be coul outside
   • prohibition
     • you mustn't drive without a license

9. HAVE TO

   • obligation
     • you have to be back at 10 0'clock
   • lack of obligation
     • you don't have to call a taxi

10. SHOULD

    • opinión/advice
      • you should drive more carefully

11. OUGH TO

    • opinión/advice
      • she ought to finish by next week

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