I work in transcription, and I continue to come across a sentence structure that boggles me. In my search for an answer, I've found conflicting conclusions, so I'm hoping you all can help me.
Often, speakers will use sentences like "He did not understand that (,) if he'd complimented the elderly woman (,) she may have helped him."
In reading, I most commonly see only the second comma being used. However, I have seen support for omitting both commas as well as support for including both commas. Online, the top (and only) answer indicates both commas are necessary, but I'm unsure about the legitimacy of the answer and the qualifications of the advisor.
Is it correct to have one comma, both commas, or no commas?
Any and all help is appreciated.