“请假”的英文表达

1.Can I have a day off?

我能请一天假吗？

2.I would like to request a leave of absence.

我想请个假。

3.I need to take some time off. 

我需要请一段时间的假。

4.I have to ask for leave tomorrow morning.

我明天上午得请个假。

5.Can I ask for leave to see my friend in the hospital?

我能请假去医院看望我的朋友吗？

6.I don't feel well this morning. Perhaps I ought to call in sick.

我今天早上感觉不太舒服，或许我应该打电话请个假。