When do I use "then"?
Use then for time or order — "first this, then that." For comparisons, use than.
A little morei
Then answers "when": at that time, after that, next. Than answers "more or less than what": the comparative word. If your sentence is comparing two things, it is always than.
The full entryii
Confusables
Then vs. Than
Time versus comparison — two different jobs, one letter apart.
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