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Common Mistakes and Confusing Words in English

If you want the dictionary definition, just double click on any word.
of course
vs
off course

Of course is an informal way of saying 'yes' or to give someone permission to do something.

For example:-

Student: Can I have some extra homework?
Me: Of course you can.

Off course is used when a vehicle doesn't follow a planned, or intended, route.

For example:-

Tapes recovered from the airliner's cockpit voice recorder indicate that the crew were unaware that they were off course and violating Soviet airspace.

For Johan