1. Yes. 'Would' is more polite.
New words, one handy idiom, and a 2-minute quiz — delivered to your inbox to keep your streak alive.
Laborious'come again' ... Is it informal?Yes. I would call it very informal.
LaboriousCould we say that in any situation when we want the person we are talking to repeat something?I wouldn't use it in a conversation with the Queen of England.