Modal Verbs

Modal Verbs:

1. Must:

• Function: obligation/Certainty
• Examples: 

     - You must quite smoking.
     - Adrian must be crazy he does strange  things.
  2. Mustn't:

• Function: Prohibition.
• Example:

      - You mustn't cheat in exams.
 3. Can:

• Function: Ability.
• Example:

      - Mathieu can speak Spanish.
 4. Can't:

• Function: 

      - Impossibility: Jorge can't be awash now.
      - Inability: Sara can't speak Japanese.
      - Permission: Can I go out please?
      - Request: Can you close the window, please!
  5. May:

• Function:

      - Probability: Alita may travel next week.
      - Permission: May I go out, please?
  6. Should:

• Function:

     - Necessity: We have an exam tomorrow, so we should revise for it.
     - Advice: You should quite smoking.