La meva veïna treballa a una oficina de la ciutat.

In Catalan, possessives are very often used together with the definite article.

So la meva veïna literally looks like the my neighbor, but it simply means my neighbor.

This is normal Catalan:

• el meu amic = my friend
• la meva mare = my mother
• els meus llibres = my books

In some special contexts, the article may be left out, but for ordinary sentences like this one, la meva veïna is the standard form.

Because veïna is the feminine form, meaning female neighbor.

• veí = male neighbor
• veïna = female neighbor

Since the sentence uses la meva, everything agrees in gender:

• la = feminine singular
• meva = feminine singular
• veïna = feminine singular

If the neighbor were male, it would be:

• El meu veí treballa a una oficina de la ciutat.

The two dots over ï are called a diaeresis. They show that the i is pronounced separately, not merged into the previous vowel.

So veïna is pronounced roughly like:

• veh-EE-nuh or broken into syllables:
• ve-ï-na

Without the diaeresis, a learner might try to read it as one vowel group, but Catalan wants you to separate them.

Treballa is the third person singular present tense of the verb treballar (to work).

So:

• jo treballo = I work
• tu treballes = you work
• ell/ella treballa = he/she works

Since la meva veïna is she, the sentence uses treballa.

Here a marks location, so it corresponds to English at or in, depending on the natural English translation.

So:

• treballa a una oficina = she works in/at an office

Catalan often uses a in places where English would choose between at and in. You should not expect a one-to-one match with English prepositions.

In many contexts, yes, you may hear en una oficina, and it can sound natural depending on variety and context. But a una oficina is completely standard here.

For a learner, the safest takeaway is:

• treballar a una oficina is a perfectly good Catalan sentence.

So if you are producing Catalan, this sentence is correct as it stands.

Una oficina means an office, so it is indefinite: we are not identifying a specific office already known to the listener.

• una oficina = an office
• l'oficina = the office

So:

• treballa a una oficina de la ciutat = she works at/in a city office, one office in the city
• treballa a l'oficina de la ciutat would suggest a specific office, perhaps the city office or the office of the city

De la ciutat modifies oficina.

Literally, it means of the city, but in natural English it often comes out as something like:

• in the city
• from the city
• a city office

The exact English wording depends on the intended meaning, but grammatically in Catalan it is a de + noun phrase attached to oficina:

• oficina de la ciutat

It helps specify what kind of office or which office we mean.

Because ciutat here is being treated as a specific noun phrase: the city.

So Catalan uses the article:

• de la ciutat = of the city

This is very common. Catalan often keeps the article where English might be more flexible.

The sentence follows a very common Catalan pattern:

Subject + verb + complement

• La meva veïna = subject
• treballa = verb
• a una oficina de la ciutat = place/complement

So the structure is straightforward and very similar to English:

• My neighbor works in an office in the city.

Catalan word order can be more flexible than English, but this is the neutral, standard order.

You would change the article, possessive, and noun so they agree in gender and number.

Male singular

• El meu veí treballa a una oficina de la ciutat.

Female plural

• Les meves veïnes treballen a una oficina de la ciutat.

Male plural

• Els meus veïns treballen a una oficina de la ciutat.

Notice the agreement:

• el / la / els / les
• meu / meva / meus / meves
• veí / veïna / veïns / veïnes
• treballa / treballen

Yes, a few useful ones:

• meva is roughly MEH-vuh
• veïna is ve-Ï-na, with the i pronounced separately
• treballa sounds roughly truh-BAH-yuh in many accents, with ll pronounced like a palatal sound
• ciutat is roughly see-oo-TAT or syoo-TAT, depending on accent

The main thing learners often miss is veïna, because of the diaeresis, and treballa, because Catalan ll is not the same as English l.