Vi øver på partnerbyttet under øvelsesrunden.

Yes. Øver is the present tense of å øve.

In Norwegian, the present tense often covers both:

• We practice
• We are practicing

So Vi øver på partnerbyttet can mean either:

• We practice the partner change
• We are practicing the partner change

Norwegian does not usually need a special continuous form like English am/is/are + -ing.

Because å øve på noe is the common way to say to practice something / work on something.

So:

• øve på en sang = practice a song
• øve på uttale = practice pronunciation
• øve på partnerbyttet = practice the partner change

If you just say Vi øver, it means We are practicing/rehearsing, but it does not say what you are practicing.

Because Norwegian normally writes compound nouns as one word.

Here:

• partner = partner
• bytte = change / switch / exchange

Together:

• partnerbytte = partner change / partner switch

This is very normal in Norwegian. English often uses two words where Norwegian uses one:

• dance class → one word in Norwegian if it is a compound
• partner change → partnerbytte

Partnerbyttet is the definite singular form:

• et partnerbytte = a partner change
• partnerbyttet = the partner change

Norwegian usually adds definiteness at the end of the noun, instead of using a separate word like the.

So:

• English: the partner change
• Norwegian: partnerbyttet

The base noun is partnerbytte, and it is a neuter noun:

• et partnerbytte

Its definite singular form is:

• partnerbyttet

This happens because the last part of the compound, bytte, controls the gender and inflection. A useful thing to remember is that in compounds, the final element is the important one grammatically.

So:

• bytte → byttet
• partnerbytte → partnerbyttet

It could look similar at first, because byttet can also be a form related to the verb å bytte.

But in this sentence, it is clearly a noun, because it comes after på:

• Vi øver på partnerbyttet

After på here, we expect a thing/activity being practiced, not a finite verb.

So in this sentence, partnerbyttet means the partner change, not changed as a verb.

That -s- is a linking s used in many Norwegian compounds.

The word is built like this:

• øvelse = exercise / practice
• runde = round

Together:

• øvelsesrunde = practice round

Then the definite form is:

• øvelsesrunden = the practice round

The -s- does not mean possession here. It is just a common compound linker.

Here under means during.

So:

• under øvelsesrunden = during the practice round

This is a very natural way to talk about something happening within a period of time.

If you used i øvelsesrunden, it would sound more like in the practice round as a setting or context. Under is clearer when you mean during.

Because the sentence refers to a specific practice round:

• øvelsesrunden = the practice round

This suggests that the speaker and listener already know which round is meant, for example in a lesson, rehearsal, or dance session.

Compare:

• under øvelsesrunden = during the practice round
• under en øvelsesrunde = during a practice round

So the definite form makes it sound more specific and situational.

Yes, it is completely normal.

The structure is:

• Vi = subject
• øver = verb
• på partnerbyttet = what is being practiced
• under øvelsesrunden = time phrase

So the sentence follows standard Norwegian main-clause word order:

• Subject + verb + rest

Very natural and straightforward.