La mascota espera darrere del veterinari.

Here is the sentence piece by piece:

• la = the for a feminine singular noun
• mascota = pet
• espera = waits or is waiting
• darrere de = behind
• del = of the or, in this structure, the de + el contraction
• veterinari = veterinarian / vet

So the structure is:

• La mascota = the pet
• espera = waits
• darrere del veterinari = behind the veterinarian

Because mascota is a grammatically feminine noun in Catalan, so it takes the feminine article la.

This is about the noun’s grammatical gender, not necessarily the biological sex of the animal. Even if the pet is male, the noun mascota is still feminine, so you still say la mascota.

Espera is the third-person singular present tense of the verb esperar, meaning to wait.

So it can mean:

• he waits
• she waits
• it waits
• the pet waits

In this sentence, it matches la mascota, which is a singular subject.

Catalan usually does not need subject pronouns unless you want emphasis or contrast.

English says It waits, but Catalan normally just says Espera, because the verb ending already shows the person and number.

So:

• La mascota espera is natural Catalan.
• Adding a pronoun would usually only happen for emphasis.

Darrere de is the normal Catalan way to say behind.

It works as a prepositional expression:

• darrere de la porta = behind the door
• darrere del veterinari = behind the veterinarian

So in your sentence, darrere is not standing alone. It is part of darrere de, and the de combines with el to make del.

Because in Catalan, de + el contracts to del.

So:

• de + el veterinari → del veterinari

This is very common in Catalan.

Other similar contractions include:

• a + el → al
• de + els → dels
• per + el → pel in many contexts

So darrere del veterinari is the normal correct form, not darrere de el veterinari.

Because veterinari is a masculine singular noun here.

The full form underneath is:

• darrere de el veterinari

But Catalan does not leave it that way. It contracts it to:

• darrere del veterinari

If the noun were feminine, you would not get del. For example:

• darrere de la veterinària = behind the female veterinarian

It can mean either, depending on how natural or formal you want to sound in English.

In Catalan, veterinari is the standard word for the professional. In English, that could be translated as:

• veterinarian
• vet

Both are fine, depending on the context.

Yes. The Catalan present tense often covers both the simple present and the present progressive in English, depending on context.

So La mascota espera can be understood as:

• The pet waits
• The pet is waiting

Catalan does have ways to emphasize an ongoing action, but the simple present is often enough.

Yes. The order is very normal and straightforward:

• subject: La mascota
• verb: espera
• place expression: darrere del veterinari

Catalan word order is often similar to English in basic sentences.

You can sometimes move parts around for emphasis, such as:

• Darrere del veterinari, la mascota espera

But the original version is the most neutral and natural.

Not if you mean The pet waits behind the veterinarian.

Esperar can also mean to wait for, so:

• La mascota espera el veterinari would mean The pet is waiting for the veterinarian

That is a different sentence.

In your original sentence, darrere del veterinari tells us the pet’s position, not the person it is waiting for.

A learner-friendly pronunciation is roughly:

• da-RRE-re

A few useful points:

• the rr is a strong rolled or trilled r
• the final e is pronounced, so the word does not end like English dare
• the stress falls on the middle syllable: da-RRE-re

The exact sound can vary a bit by dialect, but the main thing is that rr is stronger than a single r.

Sometimes darrere can appear on its own in certain contexts, but when you are saying behind someone/something, the normal pattern is darrere de + noun.

So with a noun phrase like the veterinarian, you say:

• darrere del veterinari

That is the standard structure to learn.

Yes, the last part would change to match the noun.

If you mean the female veterinarian, you would say:

• La mascota espera darrere de la veterinària.

Notice the differences:

• veterinari → masculine
• veterinària → feminine
• del disappears because you now have de la, not de + el

So:

• darrere del veterinari = behind the male veterinarian / the veterinarian
• darrere de la veterinària = behind the female veterinarian