Ni iras al la kinejo por la premiero.

In Esperanto, the present tense -as covers both:

• we go
• we are going

So Ni iras can mean either, depending on context. Esperanto usually does not make a special distinction between simple present and progressive present the way English does.

Here:

• ni = we
• iras = go / are going

So Ni iras is completely normal.

Al usually means to in the sense of movement or direction toward something.

So:

• iri al la kinejo = to go to the cinema

It shows where the movement is directed. Compare:

• Ni estas en la kinejo = We are in the cinema.
• Ni iras al la kinejo = We are going to the cinema.

So al is about direction, not location.

La is the definite article, meaning the.

So:

• la kinejo = the cinema
• kinejo = a cinema / cinema depending on context

Esperanto has la for the, but it has no word for a/an. If something is indefinite, Esperanto usually just leaves the article out.

That means:

• Ni iras al kinejo would sound like We’re going to a cinema
• Ni iras al la kinejo means We’re going to the cinema

The speaker uses la because it is a specific, identifiable cinema.

Yes. Kinejo is a good example of Esperanto word-building.

It can be broken down like this:

• kin- = cinema / film
• -ej- = place for something
• -o = noun ending

So kinejo literally means something like a place for films/cinema, which is why it means cinema or movie theater.

This kind of building is very common in Esperanto, and learning the pieces helps a lot.

Por usually means for in the sense of for the purpose of, intended for, or in order to.

So here:

• por la premiero = for the premiere

It tells us the purpose of going to the cinema.

A useful contrast:

• por = for, in order to, intended for
• pro = because of, due to

So this sentence uses por because the premiere is the purpose of the trip, not the cause in the sense of something forcing it.

Because the sentence is saying why they are going to the cinema, not that they are going to the premiere as a destination in the same grammatical sense.

• al la kinejo = to the cinema → destination
• por la premiero = for the premiere → purpose

So the structure is:

• We are going to the cinema
  • for the premiere

If you used al la premiero, that would focus on movement to the premiere itself as a target or event location, which is not the most natural way to express the idea in this sentence.

Because neither word is the direct object of the verb.

In Esperanto, the accusative -n is mainly used for:

1. the direct object
2. sometimes direction, especially when no preposition already shows direction

Here:

• al already shows direction, so kinejo does not need -n
• por is a preposition, so premiero also stays without -n

So:

• Ni iras al la kinejo is correct
• por la premiero is correct

No accusative is needed.

Premiero means premiere: the first public performance or first showing of something, such as a film.

It is a noun, which is why it ends in -o.

So:

• premiero = premiere
• la premiero = the premiere

Because the sentence has la, it suggests a specific premiere that both speaker and listener can identify.

Esperanto word order is fairly flexible, but this sentence uses the most straightforward and natural order:

• Ni = subject
• iras = verb
• al la kinejo = destination
• por la premiero = purpose

So the sentence is easy to understand as written.

You could rearrange parts for emphasis, for example:

• Por la premiero ni iras al la kinejo.

That would still be understandable, but the original order is the most neutral.

Esperanto pronunciation is regular, and the stress is almost always on the second-to-last syllable.

So:

• Ni → nee
• iras → EE-ras
• al → ahl
• la → lah
• kinejo → ki-NEH-yo
• por → por
• la → lah
• premiero → pre-mi-EH-ro

A couple of useful details:

• j is pronounced like English y
• e is like e in bed, but cleaner and steadier
• stress falls on:
  • ki-NE-jo
  • pre-mi-E-ro

So the full sentence is approximately:

nee EE-ras ahl lah ki-NEH-yo por lah pre-mi-EH-ro

Yes, grammatically it could. Since iras is just the present tense, it can sometimes be interpreted as either:

• We are going to the cinema for the premiere
  or
• We go to the cinema for the premiere

In real use, context usually makes the intended meaning clear. Without extra context, many learners first read it as we are going because it sounds like a specific plan or current action.