Eu quero sair mais cedo para evitar o trânsito.

Yes, you usually can.

Portuguese often drops subject pronouns when the verb form already makes the subject clear. Since quero clearly means I want, Eu is often unnecessary.

So both are natural:

• Eu quero sair mais cedo para evitar o trânsito.
• Quero sair mais cedo para evitar o trânsito.

Including Eu can add emphasis, contrast, or clarity.

For example:

• Eu quero sair mais cedo, mas ele quer ficar.
  = I want to leave earlier, but he wants to stay.

In everyday European Portuguese, leaving out Eu is very common.

Quero is the present tense of the verb querer (to want), first person singular:

• eu quero = I want

In this sentence, it means I want in the present, followed by an infinitive:

• quero sair = I want to leave

This is a very common structure in Portuguese:

• quero comer = I want to eat
• quero descansar = I want to rest
• quero ir = I want to go

Because they follow structures that normally take the infinitive.

• quero sair = I want to leave
• para evitar = in order to avoid

In Portuguese, after verbs like querer, the next verb usually stays in the infinitive:

• quero estudar = I want to study
• quero dormir = I want to sleep

And after para to express purpose, the verb is also commonly in the infinitive:

• para descansar = to rest / in order to rest
• para chegar a horas = to arrive on time

Here, sair means to leave or to go out, depending on context.

In this sentence, sair mais cedo most naturally means:

• to leave earlier
• or to head out earlier

If someone is talking about work, school, or home, sair can mean leaving that place. It is broader than English leave, and context decides the exact translation.

Examples:

• Vou sair de casa às oito. = I’m leaving home at eight.
• Ela saiu do trabalho cedo. = She left work early.

Because mais cedo means earlier, while cedo on its own means early.

So:

• cedo = early
• mais cedo = earlier

Examples:

• Hoje saio cedo. = Today I’m leaving early.
• Hoje saio mais cedo. = Today I’m leaving earlier.

Even though mais usually means more, with time expressions like this it often works like the English comparative -er.

It can mean both, depending on context.

In many cases:

• mais cedo = earlier
• sometimes also sooner

For this sentence, earlier is the most natural translation because it is about leaving at an earlier time.

Examples:

• Temos de começar mais cedo. = We have to start earlier.
• Quanto mais cedo, melhor. = The sooner, the better.

So the exact English word depends on the situation.

Here, para means to, in order to, or so as to. It introduces the purpose of the action.

So:

• para evitar o trânsito = to avoid the traffic / in order to avoid the traffic

This is a very common use of para in Portuguese:

• Estudo para aprender. = I study to learn.
• Saí cedo para descansar. = I left early to rest.

Portuguese uses definite articles more often than English does.

So where English says:

• avoid traffic

Portuguese often says:

• evitar o trânsito

This does not necessarily mean a specific, uniquely identified traffic jam. It often just means the traffic in a general, everyday sense.

This is normal in Portuguese:

• Vou para o trabalho. = I’m going to work.
• Gosto do verão. = I like summer.
• O trânsito está terrível. = Traffic is terrible.

In this sentence, trânsito means road traffic.

So evitar o trânsito means:

• avoid the traffic
• avoid heavy traffic on the roads

In European Portuguese, this is the normal word for traffic in this sense.

Examples:

• Há muito trânsito hoje. = There’s a lot of traffic today.
• Fiquei preso no trânsito. = I got stuck in traffic.

The given order is natural and standard:

• Eu quero sair mais cedo para evitar o trânsito.

But Portuguese does allow some flexibility, especially for emphasis.

Possible alternatives:

• Quero sair mais cedo para evitar o trânsito.
• Para evitar o trânsito, quero sair mais cedo.

The second version emphasizes the purpose first: To avoid the traffic, I want to leave earlier.

Still, the original order is probably the most neutral and common.

Not with the same meaning.

• para evitar o trânsito expresses purpose:
  in order to avoid the traffic
• porque expresses reason/cause:
  because

So:

• Quero sair mais cedo para evitar o trânsito.
  = I want to leave earlier to avoid the traffic.

If you use porque, the sentence would need a different structure and meaning, for example:

• Quero sair mais cedo porque há muito trânsito.
  = I want to leave earlier because there is a lot of traffic.

So para and porque are not interchangeable here.

A learner-friendly approximation is something like:

• TRAHN-zee-too

But in European Portuguese, pronunciation is more reduced than in English, especially unstressed vowels.

A few things to notice:

• The â/ã-like nasal quality in trân-
• The stress is on trân
• The s in -sito sounds like a z here because it is between vowels

So roughly:

• trânsito → stress on the first syllable

If you want to sound more natural, listen carefully to native European Portuguese, because vowel reduction is a big feature of the accent.

Yes, it sounds completely natural in European Portuguese.

It is clear, grammatically correct, and very typical of everyday speech. A speaker in Portugal might say it in contexts like:

• leaving home earlier in the morning
• leaving work earlier
• planning travel to avoid rush hour

A slightly shorter everyday version would also be natural:

• Quero sair mais cedo para evitar o trânsito.

That is probably how many people would say it in normal conversation.

Yes, and that is also very natural in European Portuguese.

• Quero sair mais cedo para evitar o trânsito.
• Quero sair mais cedo para não apanhar trânsito.

Both are good, but they feel slightly different:

• evitar o trânsito = avoid the traffic
• não apanhar trânsito = not get caught in traffic / not hit traffic

In Portugal, apanhar trânsito is very common in everyday speech.

So if you want a more colloquial alternative, this is a great one.