I'd like that piece of cheese
我想买那块奶酪
I'd like a slice of pizza
我想买一块披萨
I'd like six slices of ham
我想买六块火腿
how much would you like?
您需要购买多少？
could I try this on?
我可以试试这个吗？
could I try these on?
我可以尝试一下吗？ （当谈论鞋子、裤子时，或者当您想试穿不止一件商品时）
could I try these shoes on?
我可以试穿这双鞋吗？
do you want to try it on?
你想尝试吗？
