I think I know what you mean when you say the “omission of any comma before a conjunction” but is that what your words say?  Do you put a comma before the conjunction in these sentence?

            He left the store because he had finished his shopping.

            He left the store and he headed home for lunch.

            That’s comparing apples and oranges.

I am also interested in your definition of grammar. Any definition of grammar from anyone in the group. Thanks. Dick
To join or leave this LISTSERV list, please visit the list's web interface at: http://listserv.muohio.edu/archives/ateg.html and select "Join or leave the list"

Visit ATEG's web site at http://ateg.org/