If you don't know a person's last name, use 'ma'am' or 'sir'.

如果你不知道一人的姓， 你应称呼他为 'ma'am' 或 'sir' 。

Can you tell me when …will be in?

你能告诉我……什么时候在吗？

That guy has a new job every week.

这家伙一个星期换一个工作。

Can I use your car for a couple of hours?

我们能借你的车用几个小时吗？

I want an expensive luxury car.

我想买一辆昂贵的豪华汽车。

Don't get fresh with me!

别碰我。