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.
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