There might be a lot of things you could do at 1:00 am, but you'd best go to bed; but I don't really think this is the thinking behind it, as it's always a conceptual binary decision: good to …
0. It does mean literally "I'm giving you my best wishes," but it's a formality like "Sincerely yours." Idiomatically it can mean anything from "I'm giving you my best wishes" to "I'm …
If it's a command, then it's correct. For example a coach could say to a player, if you want to win, you be the best! Although not forbidden, imperatives of the second person seldom …
I think it's usually best to avoid clever responses to such a standard question, particularly when you're with new acquaintences. Sure, you could reply with something like, "I'm happy as a …
You can hint at the amount of time you've been waiting and provide genuinely helpful information by referring to an earlier correspondance: "This is in relations to [such and such]. My mail from …
更多内容请点击：More formal way of saying: "Sorry to bug you again about this, but ..."