I think it is either used like that in the specific usages or there is a much better explanation:D
New words, one handy idiom, and a 2-minute quiz — delivered to your inbox to keep your streak alive.
Ahmedali111My point is( IN STORIES AND NOVELS" could" and " might" are used without adding " have " to them while talking about a possiblility in the past). does it happen in narration only ?No, I don't think you understood Goodman's point.