1.Would you wrap it for me?
你能帮我包起来吗?
(也可以这样说：Can you wrap it for me?
Would you like to wrap it for me?)
2.Can you give me the invoice?
能不能给我一张发票?
(也可以这样说：I’d like a receipt.
Please give me the invoice.)
3.Add a pack of these, will you?
给我个袋子装起来，好吗?
4.Can you gift-wrap this, please?
能不能包装一下?
5.Can I bother you to carry it to my car?
我能麻烦你把它搬到我车上吗?
6.Please do me a favor to put it in my car trunk.
请帮忙把它放进车的后备箱里。