Most people confuse these words at least once!
Than is used to show a comparison (more than two; I’d rather go to the concert than see a movie). It is also used in the expression other than to show difference (I’ll go with anybody other than Fred).
Then usually means at that time or next (Then I left). It may also be used to mean in addition (Then, there are several other reasons.) or therefore (If you feel ill, then you should stay home.). Then can also be used before a title to show that a person held a position in the past (the then manager).
Try this quiz to see if you know the difference between than and then.
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