Jeg har ni bøger i rummet.

I have nine books in the room.

Breakdown of Jeg har ni bøger i rummet.

• jeg: I
• i: in
• bogen: the book
• rummet: the room
• have: to have
• ni: nine

Questions & Answers about Jeg har ni bøger i rummet.

Why is it har and not er to express I have?

Danish uses the verb at have (har in the present tense) to express possession, just like English uses to have.

• Jeg har = I have
• Jeg er = I am

So Jeg har ni bøger i rummet literally mirrors English structure: I have nine books in the room. Using er here would be wrong, because er describes a state or identity, not ownership or possession.

Why does the number ni come before bøger?

In Danish, numbers normally come before the noun they count, just like in English:

• ni bøger = nine books
• tre biler = three cars
• to hunde = two dogs

So Jeg har ni bøger is the standard order: subject – verb – number – noun.

Why is the plural bøger and not something like boger?

The singular is:

• en bog = a book

The plural is irregular and changes both the vowel and adds -er:

• flere bøger = several books

This vowel change (o → ø) is called omlyd (umlaut), and it happens in several common Danish nouns:

• en bog → bøger
• en fod (foot) → fødder (feet)
• en hånd (hand) → hænder (hands)

So bøger is simply the correct irregular plural form of bog.

Why is it i rummet and not just i rum or i et rum?

Danish marks definiteness mostly with an ending on the noun:

• et rum = a room (indefinite, singular)
• rummet = the room (definite, singular)

So:

• i et rum = in a room (some unspecified room)
• i rummet = in the room (a specific room that speaker and listener know about)

Your sentence uses i rummet, so it is talking about a particular, identifiable room, not just any room.

Why does rum take the ending -met and become rummet?

rum is a neuter noun:

• Indefinite singular: et rum
• Definite singular: rummet

For neuter nouns (those that use et), the definite singular ending is -et, which merges with the final m in rum:

• et hus → huset (house → the house)
• et rum → rummet (room → the room)
• et bord → bordet (table → the table)

So rummet is rum + et, not a separate stem.

What is the difference between rum and værelse?

Both can translate as room, but they are used differently:

• rum: a room in a general or abstract sense; a space, a room in a house, an office, etc.
  • et rum = a room / a space
• værelse: typically a room used for living or staying in, such as a bedroom or hotel room.
  • et værelse = a (bed)room / hotel room

Examples:

• Mit værelse er på første sal. = My (bed)room is on the first floor.
• Der er tre rum i lejligheden. = There are three rooms in the apartment.

Your sentence with i rummet is neutral: in the room as a physical space. If you wanted to emphasize a bedroom or hotel room: Jeg har ni bøger på værelset (though that slightly changes the preposition; see another answer below).

Can I say Jeg har i rummet ni bøger, or is the word order fixed?

The neutral, most natural word order is:

• Jeg har ni bøger i rummet.
  • subject (Jeg)
  • verb (har)
  • object (ni bøger)
  • place adverbial (i rummet)

You can move i rummet earlier:

• Jeg har i rummet ni bøger.

But that sounds marked or stylistic, as if you are contrasting in the room with some other place (for example, i stuen or i køkkenet). In normal, context‑free speech, you would keep i rummet at the end.

Why isn’t it bøgerne if we say the room (rummet)?

Definiteness in Danish is marked separately on each noun phrase:

• bøger = books (indefinite plural)
• bøgerne = the books (definite plural)

In Jeg har ni bøger i rummet, only rummet is definite:

• ni bøger = nine (unspecified) books
• i rummet = in the room

If you said:

• Jeg har de ni bøger i rummet. = I have the nine books in the room.

then both nine and books are definite (de + bøgerne meaning the nine specific books). Your original sentence just states that there are nine books (not necessarily special or previously known) in a specific room.

Could I drop jeg and just say Har ni bøger i rummet, like in Spanish or Italian?

Normally, no. Danish does not usually drop subject pronouns. You almost always need to state the subject:

• Jeg har ni bøger i rummet. = I have nine books in the room.

Dropping jeg:

• Har ni bøger i rummet.

would sound incomplete or like a note/telegraphic style (or maybe a headline). In full, normal sentences, keep the pronoun.

Why do we use i and not på: i rummet versus på rummet?

Both i and på can translate as in / on / at, but they are used differently with specific nouns.

For rum, you normally use i:

• i rummet = in the room (inside the physical space)

På værelset is very common, though:

• på værelset = in the (bed)room / in the hotel room

This is largely idiomatic: some locations take i, some take på.

Typical patterns:

• i rummet, i huset, i stuen = in the room, in the house, in the living room
• på værelset, på kontoret, på skolen = in/at the room, at the office, at school

So with rum, i rummet is the natural choice.