Okay--I know that you-all and y'all are peculiar (make that my idiolect, if you will) to the Southeastern United States. To say nothing of the even stranger-sounding your-all's. But--there are other times when I use the word all, and I've just sort of assumed the following types of uses are common everywhere: 1.) "You had a party--who all was there?" 2.) "You went different places--where all did you go?" 3.) "You had plans with a friend--what all did you do?"
Does anybody else here use this word in this way?