Comma used instead of "dash modifier dash"??

[AsadA969]

Hi Stacey,
in B and D, modifier carries two dashes before and after of modifier. But, when you provided your own examples, you used comma (,) instead of two dashes. My question is: when we make any analogy, should we use comma instead of two dashes (dashes used before and after of modifier)?
Thanks

B says: Although heirloom tomatoes appear less appetizing -modifier- heirlooms are
D says: heirloom tomatoes appear less appetizing -modifier- heirlooms are

examples quoted from your explanation:
Although I went to the store, I did not buy anything.
I went to the store, I did not buy anything.

[StaceyKoprince]

Note: this question belongs in the Verbal folder area. Quick answer: no, you can't always use dashes to break off a modifier where you would normally use commas. Modifiers broken off by commas are still part of the "flow" of the sentence. Dashes are meant to indicate a kind of pause or aside - more like what you would do with parenthenses, not commas.

The Extras chapter on Structure and Modifiers in our Sentence Correction guide (6th edition) talks more about use of dashes.