Mon læreren allerede har lagt noderne frem i øvelokalet?

Mon is a small word used to express wondering, guessing, or uncertainty. In English, it is often translated loosely as:

• I wonder if ...
• Could it be that ...
• Do you think ...

So Mon læreren allerede har lagt noderne frem i øvelokalet? has the feeling of someone thinking aloud: I wonder whether the teacher has already put the sheet music out in the rehearsal room.

A useful note: mon is a bit more thoughtful, literary, or formal than everyday casual speech.

Because this is not a normal yes/no question like:

• Har læreren allerede lagt noderne frem i øvelokalet?
  = Has the teacher already put the sheet music out in the rehearsal room?

With mon, Danish usually uses a word order that looks more like a statement or subordinate clause:

• Mon læreren allerede har lagt ...

So after mon, you normally get:

• subject
  • adverb
    • finite verb

That is why læreren comes before har.

Because mon already carries the idea of whether/if.

Compare:

• Jeg spekulerer på, om læreren allerede har lagt noderne frem ...
  = I wonder whether the teacher has already put the sheet music out ...

• Mon læreren allerede har lagt noderne frem ...?
  = roughly the same idea, but more compact

So in this sentence, mon makes om unnecessary.

Har lagt is the present perfect.

It is formed like this:

• har = present tense of have
• lagt = past participle of lægge (to put / lay)

So:

• lægger = puts / is putting
• lagde = put (past)
• har lagt = has put

In this sentence, har lagt means the action may already have been completed by now.

Lægge frem is a common verb expression meaning something like:

• put out
• lay out
• set out
• place something where people can use or see it

So har lagt noderne frem means the teacher has put the sheet music out for people to use.

The frem adds the idea of placing something forward / out / ready for use.

Examples:

• Hun lagde bøgerne frem på bordet.
  = She put the books out on the table.
• Kan du lægge papirerne frem?
  = Can you lay out the papers?

Because frem is a particle that belongs with the verb lægge frem, but in Danish these particles are often separated from the main verb.

So the structure is:

• har lagt = verb
• noderne = object
• frem = particle

This is very normal in Danish.

You can think of it a bit like English phrasal verbs:

• put the papers out
• lay the books down

The particle does not always have to stand right next to the verb.

Noderne is the definite plural form of node.

In a musical context, noder usually means:

• sheet music
• musical scores
• sometimes simply the music

So noderne means:

• the sheet music
• the scores

Even though node can correspond to English note, in this kind of sentence noderne usually refers to the written music, not just individual notes.

Because -ne is the normal definite plural ending for many Danish nouns.

Here is the pattern:

• en node = a note / a piece of sheet music
• noder = notes / pieces of sheet music
• noderne = the notes / the sheet music

So -ne here means the in plural.

This is one of the key differences from English: Danish often adds definiteness as an ending instead of using a separate word.

Øvelokalet means the rehearsal room or the practice room.

It is made from:

• øve = to practise / rehearse
• lokale = room / premises

Together:

• øvelokale = rehearsal room / practice room

And -et is the definite singular ending for a neuter noun:

• et øvelokale = a rehearsal room
• øvelokalet = the rehearsal room

So just like noderne has a definite ending in the plural, øvelokalet has a definite ending in the singular.

Because after mon, the sentence follows the kind of word order where sentence adverbs like allerede often come before the finite verb.

So:

• Mon læreren allerede har lagt ...

This is the same general pattern you see in subordinate clauses:

• ... at læreren allerede har lagt noderne frem

By contrast, in a normal main-clause statement, Danish often places the finite verb earlier because of the V2 rule.

So the placement of allerede is another clue that the sentence with mon behaves differently from a regular yes/no question.

Yes, it is natural and correct, but mon gives it a slightly reflective, educated, or written tone.

In very everyday spoken Danish, people might more often say something like:

• Tror du, læreren allerede har lagt noderne frem i øvelokalet?
• Jeg spekulerer på, om læreren allerede har lagt noderne frem i øvelokalet.

So the sentence is perfectly good Danish, but mon is not the most casual choice. It sounds a bit more like someone wondering to themselves.