How much is it?多少钱
Do you do discount at all?你们打折么?
May i have a bag?我可以要一个袋子么?
Are the bags chareable?袋子要付钱么?
How much are the bags?袋子多少钱一个?
Thank you!
Do you need a bag?你要袋子么?
Yes,please.要的.
No,thanks.不用了,
Any Cash Back?需要提钱么?（国外大超市都可以在付款的时候提少量的现金）
Can I have 20pounds cash back?我可以提20镑现金么?
(当购买烟,酒等制定买个一定年龄以上人士的物品时)
May I see your ID?我可以看你的身份证么?
Do you have any ID with you?你有没有身份证?
Do you have anything with your age on?你有没有什么印有你生日的东西?Passport?Student Card?Driving licence?护照?学生证?驾驶证?
（当使用信用卡的时候）
Sorry,this card dosen't go through.对不起,这张卡不能用.
Try this one.试一试这张.
Never mind,I will pay by cash.没关系,我付现金.
Dose it say why?系统显示任何原因么?
If you just sign for me here.请在这里签名.
（其他）
Have a nice day!祝你有愉快的一天!