Llegamos justo a tiempo para el estreno.

It can mean either:

• present: we arrive
• preterite: we arrived

For -ar verbs like llegar, the nosotros form is the same in the present and the preterite: llegamos.

In this sentence, context usually tells you it means we arrived. The idea of just in time for the premiere normally points to a completed event in the past.

If you wanted to make the present meaning clearer, you would usually need more context, for example:

• Siempre llegamos justo a tiempo. = We always arrive just in time.

Spanish often drops subject pronouns because the verb ending already tells you who the subject is.

• Llegamos already means we arrive / we arrived

So:

• Llegamos justo a tiempo... = We arrived just in time...

You could say Nosotros llegamos..., but that usually adds emphasis, contrast, or clarity:

• Ellos llegaron tarde, pero nosotros llegamos justo a tiempo.
  = They arrived late, but we arrived just in time.

Here justo means just, exactly, or right.

In the expression justo a tiempo, it means:

• just in time
• right on time, in the sense of arriving at the last possible moment without being late

So justo is not about fairness here, even though justo can also mean fair in other contexts.

Examples:

• Llegaste justo a tiempo. = You arrived just in time.
• Es una decisión justa. = It’s a fair decision.

Because a tiempo is the normal Spanish expression for on time / in time / in time for something.

• llegar a tiempo = to arrive on time / in time

En tiempo exists in some contexts, but it is not the usual phrase here. A learner should treat a tiempo as the standard expression.

Examples:

• Llegué a tiempo. = I arrived on time.
• No vamos a llegar a tiempo. = We’re not going to arrive in time.

Here para means for.

So:

• a tiempo para el estreno = in time for the premiere

It shows the event they needed to be on time for.

Compare:

• Llegamos a tiempo para la película. = We arrived in time for the film.
• Salió temprano para la reunión. = He/She left early for the meeting.

In Spanish, it is very common to use the definite article with specific events or things that are understood in context.

So:

• el estreno = the premiere / the opening / the debut

English sometimes drops the article where Spanish keeps it, but here both languages normally use it.

Examples:

• Fuimos al estreno. = We went to the premiere.
• El concierto fue increíble. = The concert was incredible.

Estreno usually means the premiere, opening night, first showing, or debut of something.

It can be used for:

• a film
• a play
• a TV series
• a show
• even the first use of something new in some contexts

In this sentence, the most natural meaning is the premiere.

Common examples:

• el estreno de una película = a film premiere
• el estreno de una obra = the premiere of a play

In everyday Spanish, estrenar is also common:

• estrenar una película = to premiere/release a film
• estrenar zapatos = to wear new shoes for the first time

Sometimes yes, but the meaning is slightly different.

• Llegamos justo a tiempo para el estreno
  = We arrived just in time for the premiere.

This focuses on being in time for the event.

• Llegamos justo al estreno
  can sound more like we arrived right at the time of the premiere / right when it started, depending on context.

So para el estreno is often the clearer and more natural choice when you want to say in time for.

Yes, very much so.

Justo a tiempo is a very common expression meaning:

• just in time

You will hear:

• Llegaste justo a tiempo.
• Salimos justo a tiempo.
• Terminó justo a tiempo.

You can also say simply a tiempo:

• Llegamos a tiempo. = We arrived on time.

Adding justo makes it more precise: they arrived at the last possible moment before being late.

Yes, Spanish word order is flexible, but the given version is the most natural neutral order.

Standard order here is:

• Llegamos = verb
• justo a tiempo = adverbial phrase
• para el estreno = prepositional phrase

You could move things around for emphasis, for example:

• Justo a tiempo llegamos para el estreno.
• Para el estreno llegamos justo a tiempo.

These are possible, but they sound more marked or stylistic. For everyday speech, Llegamos justo a tiempo para el estreno is the most straightforward.

It is pronounced roughly ye-GA-mos in most of Spain, though pronunciation of ll can vary.

It has no written accent mark because it follows the normal Spanish stress rules:

• Words ending in -n, -s, or a vowel are usually stressed on the second-to-last syllable
• llegamos ends in -s, so the stress naturally falls on ga

So the stress is:

• lle-GA-mos

No accent mark is needed because the stress is already regular.