A: You did all the housework yourself.
B: Well, not quite all of it. I still have some ironing to do.
A: So, that's what you're doing, ironing. Um, what's ironing?
B: Oh, let me show you. This is the iron. Oh, it's hot. I press it down on the shirt.
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Which is grammatically correct:
1- that's what you're doing, ironing < with comma
2- that's what you're doing ironing < without comma
Thank you
Use the comma. The sentence is clearer that way. In speech there's a short pause where the comma is.
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Use the comma. The sentence is clearer that way. In speech there's a short pause where the comma is.
CB