Sorry Tuongvan,
Ruslana was kind enough to direct my attention to this post. I had somehow missed it.
1/ Because they worked on Sunday, they were given Monday as a [comp day] [compensatory day off].
Do you mean" ....Monday as a comp day off or ....Monday as a compensatory day off " ? or just " comp day ( without off ) "? while compensatory day must goes with off ?
It's not very precise. Certain as "a comp day" you don't need off. It's understood. You can go either way with the longer form. Again, I want to stress this is American business use. I saw another post used "in lieu" which is not used here, so I stayed away from the thread at that point.
2/ I'm taking Monday as my comp [compensatory] day for working on Sunday.
Why don't we say :
a/ " I'm taking Monday as my comp [compensatory] day off for working on Sunday." " instead of " I'm taking Monday as my comp [compensatory] day for working on Sunday" (without OFF )
or:
b/ I'm taking Monday off as my comp [compensatory] day for working on Sunday.? -- This seems quite natural to me. I'm taking Monday off as my comp day. However, you can also omit the "off" - the meaning is quite clear. The very idea of a comp day is that you are off from work, so the off is redundant.
3/ Our office will observe "name of holiday" on Monday.
Can we say : a/ Our office will have /take Monday off as a comp day for Sunday -- Only if the entire office worked on Sunday. A comp day is when you work extra hours beyond what you were scheduled. You either need to be paid for them (as well as any over time) or you need to get time off equal to what you worked. It is NOT related to holidays that fall on a weekend.
b/ Our office will have /take Monday as a comp day off for Sunday -- No, this is not at all natural.
4/ I was not at work Monday because that was my comp day for working Sunday. -- This sounds very natural
Why don't we say :" I was not ...... because that was my comp day off for working Sunday" insteasd of ".....that was my comp day for working Sunday ".( without OFF )?
Please kindly explain when we use comp day off and when we have to use comp day without " off " -- As I said before, the off is redundant. It's common to refer to "taking time off" or "I'll take Monday off" but the "off" does not go with the phrase "comp day."
If you want to post a couple other sentences, I'll tell you whether they sound natural in American business jargon. Now that I've posted here, it will show up in "my threads" and I'll see it more quickly!