你想要买我的英文

What can i do for you?或者是楼上说的can i help you都可以都是比较委婉的询问。what do you want to buy ？句子在外国人看来是不礼貌的，是汉语式的英语。 希望对你有所帮助。

I want you to buy me an eraser.

店老板：好的，你想买什么？Shopkeeper:Okay, what would you like?你想买什么： What can I do for you?；A: What can I do for you? What can I do for you?What can I do for you? 你想买什么A: What can I do for you? （你想买什么）B: I’m looking for a sweater. （偶想买件毛衣 .）A: Which sweater would you like? （你喜欢哪一件） ...-如果你想买什么的话, 别忘了给我打电话： Say, if you need anything, just give me a call. Say, if you need anything, just give me a call.Lesson 12:你是干什么工作的 ...Sure, I’m a salesman. 啊! 我是一名推销员.Say, if you need anything, just give me a call. 如果你想买什么的话, 别忘了给我打电话Fresh milk! Fresh milk! 新鲜牛奶! 新鲜牛奶! ...

What do you want to buy?

can i help you? 一般不用，what do you want to buy

I want you to buy me an eraser.或者I want you to buy an eraser for me.

What do you want to buy?请问你想要买什么? What do you want?你想要买什么？May I help you with something?您要买什么吗？What did you have in mind?你想好要买什么了吗？