请问,我可以在哪里结账?
qǐngwèn , wǒ kěyǐ zài nǎlǐ jié zhàng ?
Excuse me, where can I pay the bill?
我已经结账了,不用再付钱。
wǒ yǐjīng jié zhàng le , bùyòng zài fùqián 。
I have already settled the bill, no need to pay again.
服务员,我准备结账。
fúwù yuán , wǒ zhǔnbèi jié zhàng 。
Waiter, I am ready to settle the bill.