on vacation的意思是去渡假。 如：Vacationers are people who are on vacaton... parents during the Christmas vacation. She's on vacation this week and next. 在字典上，沒有看到vacation與in連用的例子。所以in vacation可能...
on vacation 代表在度假中,不一定是過去、 現在、 或未來 I'm on vacation now. I was on vacation last week. I'll be on vacation in...
...you for a week. Where have you been? B: I was on vacation. A: Oh, where did you go? B: I went to...