Treballar a temps parcial és possible.

Because Catalan often uses the infinitive as the subject of a sentence, where English often uses a -ing form.

So:

• Treballar = to work
• but in this sentence it functions like working

A close parallel is:

• Fumar és dolent. = Smoking is bad.
• Llegir ajuda. = Reading helps.

So Treballar a temps parcial is the whole subject: Working part-time.

It is a fixed expression meaning part-time.

Literally, it looks like at partial time, but you should treat a temps parcial as one set phrase. Catalan commonly uses it after verbs like treballar.

A useful comparison:

• a temps parcial = part-time
• a temps complet = full-time

Because a temps parcial is the normal Catalan expression for part-time.

You do not usually build it word by word from English logic. It is simply the idiomatic form Catalan uses, just as English says part-time rather than something more literal like at partial time.

So it is best learned as a chunk:

• treballar a temps parcial
• feina a temps parcial

Because a temps parcial is a fixed prepositional phrase. In this expression, Catalan does not use an article.

So you say:

• a temps parcial

not:

• a el temps parcial
• al temps parcial

This is one of those combinations that is best memorized as a whole expression.

Because in Catalan, adjectives often come after the noun they describe.

Here:

• temps = time
• parcial = partial

So temps parcial follows the common Catalan pattern noun + adjective.

English often puts adjectives before nouns, but Catalan very often places them after.

Because the whole phrase Treballar a temps parcial is treated as one singular idea.

Even though it contains several words, it functions as a single subject, so Catalan uses:

• és = is

This is similar to English:

• Working part-time is possible.

not

• Working part-time are possible.

Because this sentence expresses a general fact or possibility, and Catalan normally uses ser for that.

• ser is often used for definitions, identity, general qualities, and broad statements
• estar is more often used for location or temporary states

Here, the idea is:

• Working part-time is possible

That is a general statement, so és possible is the natural choice.

Yes. That is also correct.

Both are natural, but the emphasis is slightly different:

• Treballar a temps parcial és possible.
  Focuses first on working part-time as the topic.

• És possible treballar a temps parcial.
  Starts with the idea of possibility and often sounds a bit more neutral or impersonal.

Both are good Catalan.

The accent is important.

És with an accent is the verb form meaning is.

Without the accent, es is usually a pronoun, not the verb.

So:

• és = is
• es = a pronoun used in many reflexive or impersonal structures

The accent also marks the stressed vowel.

A rough guide is:

• tre-ba-LLAR

A few helpful points:

• ll is a special Catalan sound, similar to the lli in some pronunciations of million
• the stress falls on the last syllable: trebaLLAR
• the final -r may be weak or even not pronounced in some accents, especially in Central Catalan

So depending on the accent, it may sound roughly like:

• truh-buh-LYAR
• or truh-buh-LYA

Yes, but only partly.

In the singular, possible looks the same for masculine and feminine:

• possible

In the plural, it becomes:

• possibles

In this sentence it stays singular because the subject Treballar a temps parcial is a singular idea.

So:

• és possible = singular
• són possibles = plural

For example:

• Aquest pla és possible.
• Aquests plans són possibles.