Both are fine grammatically, but it appears that you are aiming for a relatively formal setting …
You could even say, "No, I really would, but I can't, sorry." You don't have to feel that awkward. ...
can is now, could is in the future or past. “How can i help you right now?” “How could i help …
ladybug. 2020年1月8日. 英语 (英国) 英语 (美国) You can = you are able; you have the ability. You …
If taken literally, " Can you " is equivalent to asking the person if they're capable of doing …
更多内容请点击：Starting a question with 'Could you' vs. 'Can you'? [duplicate]