Improve Your English – Lesson 13: HOUR/O’CLOCK

The word hour is frequently used incorrectly, when the speaker actually means o’clock.

Hour is used to indicate the duration of something.

O’clock is used to indicate a specific time of day.

  • Don’t say: I have to meet my professor at three hour.
  • Do say: I have to meet my professor at three o’clock.
  • Do say: I have to meet my professor for an hour at three o’clock.

Learn more:

Learn more: