经典口语表达：

Mr Smith, I'd like to take tomorrow off if it's all right with you.

史密斯先生，我明天想请假，可以吗？

Would it be possible for me to take the day off this Thursday?

这个星期四，我是否可以休一天？

Director, I want to ask for leave.

主任，我想请教。

May I have one day off?

我能请一天假吗？

I'm asking for a week's leave.

我准备请一周假。

还可以说：

I want to ask for leave about a week.

I want to ask for sick leave.

我想请病假。

I need to take a day off.

我想请一天假。

Do you mind if I take tomorrow off?

你介意我明天请假吗？

I wonder if it is possible for me to come in a bit late tomorrow.

我明天可能要晚一点到，不知行不行？

I got some family issues to deal with, so I need to take off tomorrow.

我家里有点事要处理，所以明天我要请假。

I've been busy with work for a long time and need a rest.

我忙了好长一段时间了，需要休息。

I would like to schedule my holidays for this year.

我要安排一下今年的假期。

Conversation:

A: Mr black. I'd like to take this afternoon off if it's all right with it.

B: But Steven, you've called in sick three times during the last three weeks.

A: I know, Mr black. I'm sorry but I really need to see the doctor this afternoon. I feel dizzy and I can't concentrate on my work.

B: All right,then. But don't forget to bring a doctor's note tomorrow.

A: OK, thank you.

Translation:

布兰克先生，我今天下午想请假可以吗？

史蒂文，你这三周来已经请了三次假了。

我知道，对不起。但是我今天下午必须去看医生。我头晕，而且不能专心工作。

好吧，但是记得明天把医生开的证明拿来。

知道了，谢谢你。