怎么样英语回答这两句话好呢？What wrong with you ? What can I do for you ?

What wrong with you ?应该是What's wrong with you ?吧
意思就是你怎么了 相当于What;s the matter?
通常是表示问的对方生病或者遇到不顺利 的事情，或者突然的事情。
What's wrong with you ?
I feel I have a cough.

What's wrong with you ?
My wallet was lost somewhere.

What can I do for you ?一般用在商店里售货员或者餐厅里服务员向顾客提供帮助，表示礼貌。
意思是 有我能为你效劳的地方么？

What can I do for you ?
I want some apples.

What can I do for you ?
Please pass me the memu,thanks.

I'm OK,thanks.
What can I do for you ?多是服务员或者售货员说的
旧说no.thanks. 或者把你想要的服务或者物品直接说出来