Meaning of ought In English

• 0 used to say that it is necessary or desirable to perform the action expressed in the verb:

  • We ought to clean up before we go home.

  • She really ought to apologize.

• 1 used to say that the action expressed in the verb is probable or expected:

  • He ought to be home by seven o’clock.

  • The curtains ought to be ready on Monday.

  • At his age, he ought to have known better.