Where should these commas go? First, find the introductory clause, then put a comma after it. Enjoy the challenge.

An introductory clause helps set the stage for what's coming next. It often tells when, where, why, or how something happens. If you see a sentence starting with words like before, after, as soon as, because, since, if, or although, then chances are good that it's an introductory clause. You usually need to put a comma after it. Ready to give it a try? Grab a pencil, and let's get started!