Might seem a trivial question to many of you, but the question occurred to me a lot of times: Do we need comma after -ing forms like the followings?

Walking down the street , Jim hears a sound.

closed as unclear what you're asking by Cascabel, RaceYouAnytime, David, Davo, Chris H Jul 18 '17 at 14:00

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I would use a comma for the following reason:

If you were to take out the non-essential information, down the street, the sentence would read strangely without the comma: "Walking Jim hears a sound." Without the pause between walking and Jim, it reads as though the sentence is about a person who has been given the nickname Walking Jim, rather than being about a person named Jim who is walking, if that makes sense.

Therefore, a comma is required after the -ing form of a verb before the noun to which it refers.

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