MODAL,USE OF MUST AND OUGHT TO

USE OF MUST

To show the duty / obligation, instruction strong advice, Compulsion and necessity-

  1. I must do my duty.
  2. You must help the needy.
  3. You must obey your Parents.
  4. Staff must be at their desk 9.00.
  5. Pass jams must use the over bridge.
  6. It is raining so I must go in.
  7. I must finish the work today.
  8. We must do as we are told.

To show probability or like likelihood, prohibition emphatic advice. Question & answer.

  1. He must be mad to do that.
  2. He must be an idiot.
  3. There must be fifty people there.
  4. You must not tell a lie.
  5. You must not drive fast.
  6. You must not miss the film.
  7. Must I go with you?
  8. Yes, you must.

USE OF OUGHT TO

To show moral or social obligation and advice.      

  1. We ought to help the poor.
  2. You ought to respect your teacher.
  3. We ought to walk every morning.
  4. The medicine ought to be taken in time.
  5. Coffee ought to be taken while it is hot.

To show probability, guess sensible action, order and duty / obligation.

  1. Rana ought to be here now.
  2. He ought to have invited him.
  3. You ought to do it.
  4. You must do it.

 

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