Jag vill inte stå i kö på postkontoret igen.

In a main clause, Swedish normally puts the finite verb in the second position. Here, the finite verb is vill.

So the basic pattern is:

• Jag = subject
• vill = finite verb
• inte = negation

That gives:

• Jag vill inte ... = I do not want ...

This is very common in Swedish main clauses:

• Jag kan inte komma. = I can’t come.
• Hon ska inte jobba. = She isn’t going to work.

In some subordinate clauses, inte can come before the verb, but not here.

After modal verbs like vill, kan, ska, måste, and bör, Swedish normally uses the infinitive without att.

So:

• Jag vill stå i kö. = I want to stand in line.
• not Jag vill att stå i kö.

Compare:

• Jag försöker stå i kö lugnt. = I am trying to stand in line calmly.
• Jag hoppas att komma i tid is not the normal pattern; many verbs use different constructions.

A useful rule:

• After vill, use the bare infinitive.

Yes, stå i kö is a very common expression meaning to stand in line or to queue.

Literally:

• stå = stand
• i kö = in a queue/line

So:

• stå i kö = stand in line

Examples:

• Vi fick stå i kö länge. = We had to stand in line for a long time.
• Jag hatar att stå i kö. = I hate standing in line.

Even if people are not literally standing the whole time, Swedish still often uses stå i kö.

Because the idiomatic expression is stå i kö. Swedish uses i in this phrase.

Prepositions often do not match English one-for-one, so it is best to learn this as a chunk:

• stå i kö = stand in line
• sitta i bil is not the normal way to say sit in a car; prepositions vary by expression

So here, i is simply the correct preposition for this fixed phrase.

Swedish often uses på for places and institutions where English might use at or sometimes in.

So:

• på postkontoret = at the post office

This is very natural Swedish. Similar examples:

• på banken = at the bank
• på sjukhuset = at the hospital
• på jobbet = at work

Using i would suggest being physically inside in a more literal spatial sense, but with places like this, Swedish often prefers på.

So in this sentence, på postkontoret is the normal choice.

Postkontoret is the definite singular form of postkontor.

• ett postkontor = a post office
• postkontoret = the post office

This noun is a neuter noun (ett noun), so the definite singular ending is -et:

• ett hus → huset
• ett kontor → kontoret
• ett postkontor → postkontoret

So på postkontoret means at the post office.

Igen means again.

In this sentence:

• Jag vill inte stå i kö på postkontoret igen.
• I don’t want to stand in line at the post office again.

Putting igen at the end is very natural in Swedish. It usually modifies the whole action:

• do that again

You can sometimes move adverbs around for emphasis, but the final position is common and neutral.

Examples:

• Jag vill se filmen igen. = I want to see the movie again.
• Hon gjorde fel igen. = She made a mistake again.

Yes, Swedish also has the verb köa, which means to queue.

So you could say:

• Jag vill inte köa på postkontoret igen.

That means almost the same thing.

The difference is mostly stylistic:

• stå i kö is extremely common and very natural
• köa is also correct and common

Both are good. Learners should recognize both.

Yes. Vill is the present tense of vilja.

• jag vill = I want

In Swedish, the present tense is used here just as in English:

• Jag vill inte ... = I don’t want ...

The second verb, stå, is in the infinitive because it follows the modal-like verb vill.

So the structure is:

• present tense verb: vill
• infinitive verb: stå

Yes, absolutely.

If the meaning is already given as I don't want to stand in line at the post office again, then I don't want to queue at the post office again is also a good translation in English.

That is because:

• stå i kö = stand in line
• köa = queue

English wording depends on dialect and style:

• American English often prefers stand in line
• British English often prefers queue

So the Swedish sentence works well with either idea.

Not in this normal meaning.

• Jag vill inte stå i kö ... = I do not want to stand in line ...
• not Jag vill stå inte i kö ...

The negation inte usually comes after the finite verb and before the infinitive or the rest of the verb phrase in a main clause.

So with vill:

• Jag vill inte stå ...
• Han kan inte komma.
• Vi ska inte gå.

This placement is one of the most important Swedish word-order patterns to learn.