“请假”的英文表达有很多，
我们可以试着用下面这些地道表达。

1
ask for leave
leave除了有离开的意思，作名词它还有“假”的意思。
leave n.
time allowed away from work for a holiday or illness 假，假日，假期
例：
How much annual/paid leave do you get?
你有多少天年假/带薪假期?
She s (gone) on leave (= holiday).
她去休假了。
I ve asked if I can take a week s unpaid leave.
我已经问过能不能请一周不带薪的假。
ask for sth. 向某人要什么;要求;求助于
所以“ask for leave ”的意思就很明显了，即“请求休假”，如果你不止请假一天，你可以用这个句式来表达，
即“Ask for xx days leave ...”
如：
Ask for 2 days leave 请两天假
例：
I have to ask for leave tomorrow morning.
我明天上午得请假了。

2
take day off
除了leave之外，还有一个词可以表示“假”，那就是
day off
a day when you do not have to work or do something that you normally do
休息日
例：
I won t be in on Thursday - it s my day off.
我周四不在——那天我休息。
She s taking three days off next week.
她下星期休假三天。
当你因为某件事情想向老板请假的时候，
你就可以尝试用这个表达，
如：
He took the day off to go fishing.
他请了一天假去钓鱼
My mom s here visiting me and I d like to take two days off to show her around the city.
我妈妈要来看我，所以我想请两天假，带她到处转转。