It is very convenient to pay by credit card.

用信用卡付款非常方便。

Guest: Can I pay by credit card?

客户：我能用信用卡支付吗？

You can pay by credit card.

你可以用信用卡付账。

You can pay by credit card.

你可以用信用卡付钱。

Could I pay by credit card?

我能用信用卡付账吗？