The Grammar Guide CommaShould you use a comma before "while"?

Should you use a comma before "while"?

Should you use a comma before "while"?

While is a subordinating conjunction, but in some circumstances it can act as an adverb of concession as well. In these circumstances it should have a comma before it.

If you can replace while with as, then it shouldn't have a comma before it. It is just a normal subordinating conjunction.

The man left the restaurant while it was raining.

If you can replace while with whereas then you should use a comma before it because it is being used as an adverb of concession.

The man left the restaurant, while his partner stayed.

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