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See also: ought and aught to do with




ought to

  1. (auxiliary) Indicating duty or obligation.
  2. (auxiliary) Indicating advisability or prudence.
  3. (auxiliary) Indicating desirability.
  4. (auxiliary) Indicating likelihood or probability.

Usage notesEdit

  • See ought for fuller examples and usage.
  • Many sources consider that ought to is the basic modal verb form. However, many examples of the use of ought without to as a basic modal auxiliary verb are to be found in common use.

See alsoEdit