Difference between ざまに and ながら > **** > Big sister turned around and ?? clearly asserted... From the answer on this question about , I understand to mean "while". But in what way does it differ from ? Is it only used in writing? Is it more formal? ... etc? Why would I choose one form over the other?

is like "while", and is more like "the (very) moment~" "just as~". You'll see it in (set?) phrases like most of the time, at least in modern Japanese. You wouldn't rephrase them as , , etc. (These would make sense, but the nuance may be a bit different). You would say but not etc. I think the verb before should probably be a momentary action.

(By the way, is a set phrase meaning "(do an action) in a row.")