商务英语就是要professional，也就是  to speak in formal ways（正式的谈吐）。There are formal ways to say even the simplest words. Read the following to find out the most polite ways to say some everyday business words. 即使是最简单的单词也有正式的表达方法。下面的内容告诉你日常商务英语最礼貌的表达方法。

YES （表达“是”的几种方式）:

Affirmative, sir.

当然，先生。

Anything for you.

一切听您的。

It would be my pleasure.

这将是我的荣幸。

Of course.

当然。

NO （表达“不”的几种方式）:

Negative, sir.

先生，不是。

Sorry, that is not correct.

对不起，那是不对的。

I would be glad to, but I can't.

我很高兴这样做，可我不能。

Sorry to say I don't have time.

很抱歉，我没有时间。

I have never had that opportunity.

我从来没有那样的机会。

Thank you.

谢谢你。

Thank you for your help.

谢谢您的帮助。

I owe¹ you one.

你对我有恩。

I really appreciate your assistance².

我真的很感激你的帮助。

You are welcome.

不客气。

It is my pleasure, anytime.

我的荣幸，别客气。

Don't mention it, Miss.

小姐，不客气。

Any gentleman would do the same.

每位绅士都会这么做的。