ENGLISH

• Permission

  example:

  can

  1. You can call me at 4 p.m.

  2. Can I sit beside my bestfriend?

  
  

  could

  1. You could ask questions.

  2. Excuse me, could I just say something?

  
  

  may

  1. May I use your phone please?

  2. You may sing only the first stanza.
• Obligation example:

  must

  1. We must say our prayers now.

  2. You must pay your electric bills regularly.

  
  

  have to/has to

  1. She has to do it now.

  2. We have to be at the airport at least two hours before the flight.

  
  

  should

  1. I think we should revise our work again.

  2. Employment rate should increase next year.

  
  

  ought to

  1. We ought to employ a clerk.

  2. It's raining hard. The children ought to come indoors.
• MODALS are auxiliary verbs (also called helping verbs) like can, may, could, shall, must, or should
• Prohibition

  example:

  must not

  1. You must not loiter after nine o’clock in the evening.

  2. They must not use their cellular phones during class hours.

  
  

  should not

  1. I should not go there alone.

  2. They should not use their cellphones during class hours.

  
  

  cannot

  1. You cannot go into that restaurant without a tie.

  2. You cannot drive in this country unless you are over eighteen.

  
  

  may not

  1. You may not wear slippers in the office.

  2. You may not eat in the conference room.