What can I do for you? May / Can I help you? 你要買什么？
　　I want / I’d like a pair of sports shoes for my son.
　　我要為我兒子買雙運(yùn)動(dòng)鞋。
　　How much is it? 多少錢？
　　That’s too expensive, I’m afraid. 恐怕太貴了。
　　That’s fine. I’ll take it. 很好，我買了。
　　How many / much do you want? 你要多少？
　　What color / size / kind do you want?
　　你要什么顏色/多大/什么種類？
　　Do you have any other kinds / sizes / colors?
　　你有其它種類/尺寸/顏色的嗎？
　　I bought this blouse here last week, but there seems to be something wrong with it.
　　我上周在這兒買的罩衫，好像出問(wèn)題了。
　　Can you change it? 你能換一下嗎？
　　I insist that you give me my money back.
　　我堅(jiān)持要求退錢。