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MODAL VERBS, MODAL VERBS, image, 👉 You ought to study a bit more if you…

- - - - We may go to the beach tomorrow.
        (It’s one of the options, but not sure.)
    - - It could snow tonight, but the weather isn’t that cold.
    - - I might go to the party, but I haven’t decided yet.
    - - Example
        It must be raining — everyone is carrying an umbrella.
        (Strong evidence supports this.)
- - - - You have to show your ID to enter the building.
        (It’s a rule — there’s no exception.)
    - - She must be at home; her car is parked outside.
        (Logical conclusion.)
    - - The train should arrive at 7:00.
        (According to the schedule, that’s what we expect.)
    - - He can be very helpful when he wants to.
        (It happens, but not always.)
    - - She may call you later.
        (There’s a fair chance.)
    - - He could be the one who took the book, but I’m not sure.
- - - - Must
        ~95%
        
        She must be at home; her car is parked outside.
        (Logical conclusion.)
        
        Example
        It must be raining — everyone is carrying an umbrella.
        (Strong evidence supports this.)
      - Should
        '>50%
        
        The train should arrive at 7:00.
        (According to the schedule, that’s what we expect.)
      - Have to
        ~100%
    - - Could
        Low certainty
        
        It could snow tonight, but the weather isn’t that cold.
        
        He could be the one who took the book, but I’m not sure.
      - Can
        less than "should"
        
        He can be very helpful when he wants to.
        (It happens, but not always.)
      - May
        ~50%
        
        She may call you later.
        (There’s a fair chance.)
        
        We may go to the beach tomorrow.
        (It’s one of the options, but not sure.)
      - Might
        <50%
        (Informal)
        
        I might go to the party, but I haven’t decided yet.
    - - He could be the one who took the book, but I’m not sure.
- - - - You have to show your ID to enter the building.
        (It’s a rule — there’s no exception.)
    - - Don't have
        Don't need
        
        need to
  - - - You musn't do that
        You can't do that
    - - I need to do that
        I must to do that