As férias passam rápido quando eu estou com minha família.

In Portuguese, férias is normally used in the plural when talking about a vacation period.

• as férias = vacation / holidays
• It works like a plural noun even when English uses singular vacation

So:

• As férias passam rápido. = Vacation goes by fast.

Because férias is plural, the verb also has to be plural: passam.

Because the subject is as férias, which is plural.

• as férias = the vacations / the holidays
• passam = they pass / go by

Portuguese verbs must agree with the subject:

• A viagem passa rápido. = The trip goes by fast.
• As férias passam rápido. = Vacation goes by fast.

So passam matches the plural subject férias.

Literally, passam rápido means pass quickly.

In natural English, though, it usually means:

• go by quickly
• fly by

So the sentence gives the idea that vacation feels short because time seems to move fast.

This is very common in Brazilian Portuguese. An adjective like rápido is often used in an adverb-like way, especially in everyday speech.

So both of these work:

• As férias passam rápido.
• As férias passam rapidamente.

Difference:

• rápido = more natural and conversational
• rapidamente = more formal or more explicitly adverbial

English learners often expect -mente every time, but Portuguese very often prefers the shorter form in speech.

Yes, it could.

Portuguese often drops subject pronouns when the verb form already makes the subject clear.

So both are correct:

• quando eu estou com minha família
• quando estou com minha família

Difference:

• eu can add a little emphasis or clarity
• without eu, it sounds slightly more streamlined and is also very natural

Because estou clearly means I am, the pronoun is optional here.

Because Portuguese uses estar for temporary states, situations, or location-like ideas, and ser for more permanent identity or essential characteristics.

Here, estar com minha família means to be with my family, which is a situation, not an identity.

So:

• estou com minha família = I am with my family
• sou minha família would make no sense

A useful chunk to remember is:

• estar com alguém = to be with someone

Quando means when.

It introduces the time clause:

• quando eu estou com minha família = when I am with my family

The structure is:

• As férias passam rápido = main idea
• quando eu estou com minha família = the situation/time in which that happens

So the second part explains under what circumstances vacation seems to pass quickly.

Because família is a singular noun meaning family as one group.

• minha família = my family
• minhas famílias = my families

Even though a family contains many people, the noun itself is grammatically singular, just like in English.

Also notice the agreement:

• minha matches família
• both are feminine singular

Yes. Both are correct in Brazilian Portuguese.

You can say:

• com minha família
• com a minha família

The definite article before possessives is common in Portuguese, but in Brazilian Portuguese it is often optional in many contexts.

So both sound natural, though usage can vary by region and style.

The sentence uses the present indicative:

• passam
• estou

But the meaning is not just about what is happening right now. The present tense here expresses a general truth, a habitual feeling, or something that is typically true.

So it means something like:

• Vacation goes by fast when I’m with my family.
• Vacation always seems to go by fast when I’m with my family.

Yes. Even though férias is grammatically plural in Portuguese, in English it may be translated as either:

• vacation
• holidays
• time off

The best English translation depends on context. In this sentence, vacation is often the most natural English choice, even though the Portuguese noun is plural.

Usually yes. Família refers to the family as a unit or group.

So:

• minha família can mean your family in general
• it does not have to mean every single relative is physically present

If you want to be more specific, you could say:

• meus parentes = my relatives
• toda a minha família = my whole family

But in your sentence, minha família is perfectly natural.

Yes. Some common alternatives are:

• depressa
• rapidamente

Examples:

• As férias passam depressa quando eu estou com minha família.
• As férias passam rapidamente quando eu estou com minha família.

Nuance:

• rápido = very common, casual, natural
• depressa = also common
• rapidamente = more formal or slightly more polished

All three are correct.

Yes, to some extent.

The original sentence:

• As férias passam rápido quando eu estou com minha família.

You could also say:

• Quando eu estou com minha família, as férias passam rápido.

Both mean the same thing. The difference is emphasis:

• Original order emphasizes the vacations
• Starting with quando... emphasizes the situation/time

Both are natural Portuguese.

A useful thing to notice is the written accent: férias.

The accent mark shows the stress:

• FÉ-ri-as

So the stress is on the first syllable.

Also:

• fé sounds roughly like FEH
• the rias part is lighter afterward

The accent is important because it helps show correct stress and spelling.