Is there a rule that states if a comma is needed in the following case: Doing this, does that? The following sentences made me ponder on it: Clicking on a job within a project(,) opens the page where the button is located. Cloning a job(,) allows you to set new settings.

  • No, those commas you’ve placed in brackets shouldn’t be used. – Lawrence Feb 7 at 16:22
  • Running can be strenuous. There's a gerund without a comma. – Jason Bassford Feb 7 at 19:08
  • @JasonBassford I really struggle with gerunds! I thought a gerund had to function as a verb in the sentence (as well as functioning as a noun), but in your example there's no verb function. If it was running a race (takes an object) or running quickly (modified by an adverb), it would indicate a verb function. Am I misunderstanding this? Is there a useful resource you rely on that might guide me? – Chappo Feb 8 at 7:03

For the example sentences, no.

In general, it depends on what role the gerund phrase takes.

If the gerund begins a phrase functioning as an adverb, then yes on the comma.

Reading your sentences, I do not advise using a comma.

Source for using a comma after an introductory adverb phrase

If the gerund begins a phrase that is the subject of the sentence, as in your examples, then no comma.

Beginning a sentence with a gerund does not always require one to use a comma.

In your examples, the entire phrase before each "(,)" is the subject of the respective sentence.

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