1. Could I have the check, please?
请把账单拿来。
还能这样说：
Bill, please.
Please give me the bill.
2. We have finished our meal, and I need to pay.
我们吃完饭了，要付账了。
还能这样说：
The meal has been finished, and I need to pay.
I need to pay for the finished meal.
3. Who will pay for the bill?
你们谁付账啊？
还能这样说：
Is there anyone who would like to pay for the bill?
Who is the one to give the party?
谚语：
He that borrows must pay with shame and loss.
借债的人必然要用耻辱和损失偿还。
4. You may pay at your table, sir.
先生，你可以在座位上付款。
还能这样说：
You don't need to come to the checkout table to pay, sir.
Just stay here and pay for the meal, sir.