Era un barrio pobre.

Era is the imperfect form of ser (to be), and it usually describes a background situation, an ongoing state, or what something was like in the past.

So Era un barrio pobre suggests something like:

• It was a poor neighbourhood
• describing the area as it used to be
• giving background information

By contrast, fue is the preterite, which often presents the idea as a completed fact or event. In many contexts, era sounds more natural for description.

A very rough contrast:

• Era un barrio pobre. = It was a poor neighbourhood / It used to be a poor neighbourhood
• Fue un barrio pobre. = It was a poor neighbourhood in a more bounded, completed sense

Spanish often leaves out subject pronouns when they are not needed. The verb form itself usually gives enough information.

Here, era can mean:

• he/she/it was
• or you (formal) were, depending on context

In this sentence, the context tells you that it was is the intended meaning. Spanish does not need to say ello era or eso era here.

So:

• Era un barrio pobre is completely natural
• adding a subject pronoun would usually be unnecessary

Un means a or an.

So:

• un barrio = a neighbourhood

Spanish generally uses an indefinite article here just as English does.

Compare:

• Era un barrio pobre. = It was a poor neighbourhood.
• Era el barrio pobre. = It was the poor neighbourhood / It was the impoverished neighbourhood (much more specific)

Because barrio is a masculine noun in Spanish.

You can tell from:

• the article: un barrio
• the dictionary form: el barrio

Many nouns ending in -o are masculine, and barrio follows that common pattern.

So you get:

• el barrio
• un barrio
• barrio pobre

Pobre is an adjective that has the same form for masculine and feminine singular.

So you say:

• un barrio pobre = a poor neighbourhood
• una zona pobre = a poor area

It only changes in the plural:

• barrios pobres
• zonas pobres

This is normal for many Spanish adjectives ending in -e.

In Spanish, adjectives usually come after the noun.

So:

• un barrio pobre literally = a neighbourhood poor

That is the normal word order.

If an adjective comes before the noun in Spanish, it can sometimes change the tone, emphasis, or style, but pobre after the noun is the straightforward, neutral choice here.

Not always. Pobre can mean different things depending on context.

Common meanings include:

• poor = not having much money
• pitiful / unfortunate
• poor thing

But in un barrio pobre, it most naturally means poor in the economic sense: a neighbourhood with low income or limited resources.

Spanish usually uses ser for more inherent or defining characteristics, and estar for states or conditions.

A neighbourhood being poor is treated here as a characteristic or description of what it was like, so ser is natural:

• Era un barrio pobre.

Using estar here would usually sound odd in standard usage unless the context strongly suggested a temporary condition, and even then Spanish often still prefers ser with this kind of description.

Yes. The imperfect era often carries that idea in English.

Depending on context, Era un barrio pobre could be translated as:

• It was a poor neighbourhood
• It used to be a poor neighbourhood

Both can be valid. The exact English version depends on the wider context.

You would change the noun, article, and adjective to plural:

• Eran barrios pobres. = They were poor neighbourhoods.
• Eran unos barrios pobres. = They were some poor neighbourhoods / They were poor neighbourhoods

Changes:

• era → eran
• barrio → barrios
• pobre → pobres
• un would usually become unos, though it is often omitted in plural general statements

In standard Spain Spanish, barrio is pronounced approximately like:

• BA-rryo

More carefully:

• ba-rrio
• the rr is a strong rolled or trilled r
• the i in rio works like a y sound here, so it sounds close to rryo

And era un barrio pobre is roughly:

• EH-ra oon BA-rryo PO-bre

The exact accent will vary by region, but that is a useful guide.

Yes, but barrio is very common and natural in Spain for neighbourhood or district.

• barrio = neighbourhood, district
• vecindario can mean neighbourhood too, but often refers more to the local community or residents

So in Spain, barrio is usually the more everyday choice for a place like this.

Yes. Adding muy means very:

• Era un barrio muy pobre. = It was a very poor neighbourhood.

This is a completely natural extension of the sentence.

Other possible variations:

• Era un barrio bastante pobre. = It was quite a poor neighbourhood.
• Era un barrio extremadamente pobre. = It was an extremely poor neighbourhood.