Questions & Answers about Jeg har fem bøger i rummet.
Jeg is the subject form of I. It is used because the speaker is doing the action of having.
- jeg = I
- mig = me
So:
- Jeg har fem bøger i rummet. = I have five books in the room.
You would use mig in other roles, for example after a preposition:
- Han ser mig. = He sees me.
Har is the present tense of at have = to have.
So:
- jeg har = I have
- du har = you have
- han/hun har = he/she has
Unlike English, Danish does not add -s for he/she/it in the present tense. The form har stays the same for all persons.