Vi kan sidde hvor som helst i salen, hvis der er plads nok.

Hvor som helst means anywhere.

It is made from:

• hvor = where
• som helst = a fixed expression that adds the meaning at all / ever / no matter which

So hvor som helst literally feels like wherever at all, but in natural English it is simply anywhere.

You can use the same pattern with other question words:

• hvem som helst = anyone
• hvad som helst = anything
• hvornår som helst = anytime

So in this sentence, Vi kan sidde hvor som helst i salen means We can sit anywhere in the hall.

Because after a modal verb like kan (can), Danish uses the infinitive form of the next verb.

So:

• kan = modal verb
• sidde = infinitive
• not sidder

This is just like English:

• we can sit
• not we can sits

Other common Danish modal verbs work the same way:

• vi må gå = we may/have to go
• vi vil spise = we want to / will eat
• vi skal vente = we must / are going to wait

In Danish, sidde means to be sitting / to sit in the sense of being in a seated position.

So Vi kan sidde ... means We can sit ...

If you wanted to emphasize the action of sitting down, Danish would usually use something like:

• sætte sig = sit down

So there is a difference:

• Vi kan sidde hvor som helst = we are free to be seated anywhere
• Vi kan sætte os hvor som helst = we can sit down anywhere

In many situations, both would make sense, but sidde is very natural when talking about where you are allowed to be seated.

I salen means in the hall / in the auditorium / in the room, depending on context.

Here:

• sal = hall / auditorium / large room
• salen = the hall

Danish usually adds the definite article to the end of the noun:

• en sal = a hall
• salen = the hall

So i salen is literally in-the-hall, but in natural English we say in the hall.

Because Danish uses i with enclosed spaces, rooms, halls, and buildings in many cases.

So:

• i salen = in the hall
• i huset = in the house
• i kirken = in the church

På is used in other kinds of location expressions, for example:

• på bordet = on the table
• på skolen = at the school (in some contexts)
• på kontoret = at/in the office

With sal, i salen is the normal choice when you mean physically inside the hall.

Here der works like English there in if there is enough room.

So:

• der er = there is
• hvis der er plads nok = if there is enough room

This der does not mean there as a place. It is a grammatical placeholder used in existence sentences.

Compare:

• Der er en stol i hjørnet = There is a chair in the corner
• Der er plads nok = There is enough room

So in this sentence, der is not pointing to a location. It is just part of the structure meaning that something exists.

Both can exist in Danish, but plads nok is very common and natural.

• plads nok = literally room enough
• nok plads = enough room

English strongly prefers enough room, but Danish often puts nok after the noun in expressions like this.

A useful way to think about it:

• der er plads nok = there is enough/plenty of room
• der er nok plads = there is enough room

The difference is usually small. In many contexts both are possible, but plads nok sounds very idiomatic here.

Because plads here is being used as an uncountable noun meaning room / space.

So Danish does not need en here:

• der er plads nok = there is enough room
• not der er en plads nok

If you said en plads, that would usually mean a seat or a place/spot, not room/space in the general sense.

Compare:

• Der er plads nok = There is enough room
• Der er en plads til dig = There is a seat/place for you

The sentence has two parts:

1. Vi kan sidde hvor som helst i salen
2. hvis der er plads nok

In the main clause:

• Vi = subject
• kan = finite verb
• sidde = infinitive
• hvor som helst i salen = place expression

So the order is very straightforward here.

In the hvis clause:

• hvis = if
• der = dummy subject (there)
• er = is
• plads nok = enough room

A useful thing to know is that Danish main clauses normally follow the verb-second pattern. This sentence starts with the subject, so it looks simple:

• Vi kan ...

But if another element came first, the verb would still come second:

• I salen kan vi sidde hvor som helst, hvis der er plads nok.

Yes, absolutely.

That version is also correct and very natural:

• Hvis der er plads nok, kan vi sidde hvor som helst i salen.

The meaning is the same. The difference is mainly focus:

• Vi kan sidde hvor som helst i salen, hvis der er plads nok.
  Starts with the main idea: we can sit anywhere
• Hvis der er plads nok, kan vi sidde hvor som helst i salen.
  Starts with the condition: if there is enough room

Notice that when the hvis clause comes first, the main clause has inversion:

• not Hvis der er plads nok, vi kan ...
• but Hvis der er plads nok, kan vi ...

Not always.

In modern Danish, both comma systems are accepted:

• with start comma
• without start comma

So both of these may be seen:

• Vi kan sidde hvor som helst i salen, hvis der er plads nok.
• Vi kan sidde hvor som helst i salen hvis der er plads nok.

The version with the comma is very common, especially for learners because it clearly marks the subordinate clause.

The important thing is to be consistent with whichever comma style you are using.

Sometimes, but not perfectly.

• hvor som helst = anywhere
• overalt = everywhere / all over the place

In this sentence, hvor som helst is better because it means any seat/location is okay.

If you said:

• Vi kan sidde overalt i salen

that sounds more like we can sit all over the hall or throughout the hall, which is not quite the same idea.

So for free choice among possible places, hvor som helst is the best match.

The exact pronunciation depends on accent and speaking speed, but a learner should know a few things:

• hvor often sounds roughly like vor
• som is usually short and unstressed
• helst can be reduced in fast speech

So in natural speech, the whole phrase may sound more compressed than the spelling suggests.

The most important thing is not to pronounce every letter very heavily. Danish often reduces small words and unstressed syllables.

If you want to sound natural, try keeping the stress mainly on:

• hvor
• helst

with som lighter in the middle.