take a leave 休假；请假；请假相关事宜；告假

【例句】
I urgently needed a few days off work, but I know my boss would not allow me to take a leave.
我急切地需要请几天假，但我知道老板不会同意。

And I've decided* I need to take a leave of absence.
我觉得我需要休假一段时间。