【问】 请说明ask of与ask off有何区别。

【答】 ask of (介词)表示“向……要求”：

1. It’s not too much to ask of you to clean your own shoes. (LDPV)

把自己的鞋擦干净，这对于你并不是过份的要求。

2. May I ask a favour of you?

可不可以请您帮个忙?ask off(副词)表示“请假”

If it’s really necessary for me to be present at the meeting，I shall have to ask off.

如果一定要我出席会议，那我就得请假。