Can anyone tell me the proper way to determine if you use "everyday" or
"every day"?
"Every day" is technically a noun (with an adjective), although it can
be used in the same way as "everyday." The correct way to use it, if
you want to distinguish the two, would be to use it to refer to a
specific time frame. (i.e. "Joan is late to work every day." or "Every
day is a new day.")
The reason I wanted to know was because a kid asked me if it was used
correctly in a sentence he read from the GPH. I had no idea what to
tell him.