El catálogo acaba de llegar.

Acabar de + infinitive is a very common Spanish structure meaning to have just done something.

So:

• acaba de llegar = has just arrived

It does not mean that something is finishing arrival. In this structure, acabar de works as a set expression.

Examples:

• Acabo de comer = I just ate / I’ve just eaten
• Acaban de salir = They just left

Acaba is the third-person singular present tense form of acabar.

It matches the subject el catálogo, which is:

• third person = it
• singular = one catalog

So:

• yo acabo
• tú acabas
• él/ella/usted acaba

Since el catálogo is singular, acaba is the correct form.

Because the expression is acabar de + infinitive. The de is required in this construction.

You should learn it as one chunk:

• acabar de hacer algo = to have just done something

So:

• acaba de llegar not
• acaba llegar

The de is part of the grammar pattern, not something optional.

After acabar de, Spanish uses an infinitive.

That is why you get:

• acaba de llegar

not:

• acaba de llega
• acaba de llegado

The pattern is:

conjugated acabar + de + infinitive

Examples:

• Acabo de ver la película
• Acabamos de abrir
• Acaban de llamar

The subject is El catálogo.

That is the thing doing the action of arriving. In English, you would usually refer to it as the catalog or it.

So the structure is:

• El catálogo = subject
• acaba de llegar = verb phrase

Spanish uses definite articles like el, la, los, and las more often than English does.

Here, el catálogo means the catalog. The sentence is talking about a specific catalog that the speaker and listener can identify.

If you said just catálogo, that would generally sound incomplete in a normal sentence like this.

Because catálogo is a masculine noun in Spanish, so it takes el.

• el catálogo

Its gender is a property of the noun itself and does not mean the object is biologically male. Many nouns ending in -o are masculine, and catálogo follows that common pattern.

The written accent shows where the stress goes: ca-TA-lo-go.

Without the accent mark, standard Spanish stress rules would place the stress differently. The accent tells you clearly that the stressed syllable is tá.

So:

• catálogo = stress on the third-to-last syllable

This kind of word is called esdrújula, and those words always have a written accent in Spanish.

In most of Latin America, ll in llegar is pronounced like y in English yes, or something close to that.

So llegar often sounds roughly like:

• ye-GAR

The g here is a hard g, like in go, because it comes before a.

The r at the end is a Spanish single r, not the strong rolled rr sound.

Pronunciation can vary by region, but ye-GAR is a good general Latin American approximation.

Not exactly.

• acaba de llegar = has just arrived
• ha llegado = has arrived

Acaba de llegar emphasizes that the arrival happened very recently, just now or a moment ago.

Ha llegado simply says the arrival has happened, without necessarily stressing how recent it was.

In many Latin American varieties, speakers often prefer simple past forms in everyday speech, but acaba de llegar is still very common when the idea is just arrived.

Yes. That would also be natural, but the nuance is a little different.

• El catálogo acaba de llegar = The catalog has just arrived
• El catálogo llegó hace poco = The catalog arrived a short while ago

Acaba de llegar usually sounds more immediate. It suggests the arrival happened just now or very recently.

Llegó hace poco is a bit less immediate and focuses more on a short time ago rather than just now.

Normally, no. In standard Spanish, that would sound unnatural here.

You usually need the article:

• El catálogo acaba de llegar

Spanish often requires an article where English might sometimes omit one. Unless Catálogo were being used as a title, label, or very unusual stylistic wording, you would keep el.

You would make both the noun phrase and the verb plural:

• Los catálogos acaban de llegar.

Changes:

• El → Los
• catálogo → catálogos
• acaba → acaban

The structure acabar de + infinitive stays the same; only the conjugated form of acabar changes to match the subject.