经典句型:I'd like to return this. 我要退货。

A:I'd like to return this.
甲:我要退货。
B:Could you please tell me the reason?
乙:能告诉我原因吗？
A:The suit doesn't fit me well.
甲:这套衣服我穿着不合身。

经典句型:Can I exchange it? 可以换货吗?

A:What can I do for you?
甲:需要什么帮助？
B:This shirt is a little big for me. Can I exchange it?
乙:这个衬衫有点大，可以换货吗？
A:Yes. Please show me the receipt.
甲:可以。请出示收据。
B:Here you are.
乙:给你。
A:I'll sign your receipt and you can go to the cashier.
甲:我会在您的收据上签字然后你可以去收银台。

句型讲解：

return是“退货”的意思，exchange表示“换货”。如:Can this TV set be returned?这台电视机可以退货吗？