Usually if you’re unsure whether a term is one word or two, the best thing to do is look up the one-word form. Imagine, for instance, that you want to know whether to write “leg room” or “legroom.” ...

I’m often astounded by the way people use “awhile” and “a while.” And, no, I’m not shocked by how badly they choose between these terms, but by how well. To understand when “a while” is preferable to ...