Learn English – Do I need to place a comma before “then”

commaspunctuation

Example:

"The helicopter will land in a minute or two
."

"Why can't we see it, then?

Do I need that comma before the then? Why and why not?

I got both versions on Google:

…wouldn't they be in the way then?

…wouldn't they be dead, then?

Best Answer

The comma can represent a syntactic pause and/or a change of intonation that accompanies and corroborates a syntactic pause.

A comma would make clear that "then" as used here is not temporal but conditional; temporal and conditional uses of then have different syntactic pauses and intonational contours.

P.S. Its being at the end of the sentence is not the deciding factor. Consider:

**I'm away Monday, but I'll be in town on Tuesday. Can I see the apartment then? [no pause before "thenn"]

The answer on the rental form is incorrect. I have no pets. I can rent the apartment, then?** [pause and different intonation to mark the meaning "in that case"]

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