Here is a learning support on using a comma to separate clauses. This is the fourth of a total of fifteen learning supports on using the comma forthcoming on Mark’s Text Terminal. (You can find an excursus on this choice of publishing practice here.)
If you find typos in this document, I would appreciate a notification. And, as always, if you find this material useful in your practice, I would be grateful to hear what you think of it. I seek your peer review.