Questions & Answers about Jeg har kun ét spørgsmål.
This is the normal Danish main-clause order:
- Jeg = subject
- har = finite verb
- kun = adverb
- ét spørgsmål = noun phrase / object
So the pattern is basically:
subject + verb + adverb + object
That is very common in simple Danish statements.
If you move things around, the meaning or emphasis changes. For example:
- Jeg har kun ét spørgsmål = I have only one question.
- Kun jeg har ét spørgsmål = Only I have one question.
So in your sentence, the placement of kun shows that it limits ét spørgsmål.
Har is the present tense of at have = to have.
In Danish, the present tense is the same for all persons:
- jeg har = I have
- du har = you have
- han/hun har = he/she has
- vi har = we have
- de har = they have
Unlike English, Danish does not change the verb to has for third person singular. It stays har.