Seja hoje, seja amanhã, preciso levar o carro.

It is a set expression that means something like whether today or tomorrow or be it today or tomorrow.

So in this sentence, seja hoje, seja amanhã introduces two possible options, while the main idea is that the action still needs to happen.

A very close English pattern is:

• whether today or tomorrow
• be it today or tomorrow

This structure is often used to show that the exact option does not matter much, because the main statement remains true.

Seja is the present subjunctive form of ser.

The verb ser is irregular, and its present subjunctive forms are:

• eu seja
• você/ele/ela seja
• nós sejamos
• vocês/eles/elas sejam

In seja hoje, seja amanhã, Portuguese uses this subjunctive form in a fixed correlative structure: seja X, seja Y.

It does not mean that someone is literally being today or tomorrow. Instead, it works idiomatically to mean whether it is X or Y.

So learners should think of it as a pattern, not as a fully literal use of ser.

In this sentence, it is best understood as subjunctive, not as a command.

That matters because seja can also be the imperative form of ser in other contexts, such as:

• Seja paciente.
  = Be patient.

But in Seja hoje, seja amanhã, nobody is being told to be anything. Instead, the sentence is using the fixed expression seja... seja... to present alternatives.

So here:

• not a command
• yes, part of a subjunctive-based expression meaning whether...or...

Yes, but it sounds a bit more formal, more polished, or more written than the simplest everyday alternative.

A Brazilian speaker might very naturally also say:

• Hoje ou amanhã, preciso levar o carro.
• Preciso levar o carro hoje ou amanhã.

Those are more direct and conversational.

By contrast, Seja hoje, seja amanhã, preciso levar o carro sounds a little more deliberate or stylistically marked. It is still correct and natural, but it has a slightly more formal tone.

Yes. In many everyday situations, that is the most natural choice.

For example:

• Hoje ou amanhã, preciso levar o carro.
• Preciso levar o carro hoje ou amanhã.

Using seja hoje, seja amanhã adds a nuance of regardless of which one it is. It can feel a bit more emphatic or elegant.

So the difference is roughly:

• hoje ou amanhã = simple, direct
• seja hoje, seja amanhã = a bit more formal, with a whether...or... feel

Usually, the standard pattern is seja X, seja Y with seja repeated.

So the expected form is:

• Seja hoje, seja amanhã...

That repetition is part of the structure.

In real language, you may sometimes hear reduced or mixed versions, but for a learner, the safest and most standard pattern is:

• seja..., seja...

It works like other paired structures in Portuguese, where both elements are repeated for balance.

The commas separate the introductory paired expression from the main clause.

The sentence has two parts:

1. Seja hoje, seja amanhã
   = the alternatives
2. preciso levar o carro
   = the main statement

The commas help show that the first part is an introductory expression.

This punctuation is especially common when the seja... seja... phrase comes at the beginning of the sentence.

By itself, levar o carro usually suggests taking the car somewhere rather than simply taking the car in a vague sense.

In many real situations, Portuguese speakers say levar o carro when they mean things like:

• take the car to the mechanic
• take the car to be washed
• take the car to a shop
• take the car somewhere for a purpose

If the destination is obvious from context, it may be omitted.

So preciso levar o carro often feels slightly incomplete in isolation, but it is still very normal if the situation is already known.

Portuguese often omits subject pronouns when they are clear from the verb form.

Here, preciso already tells you the subject is eu:

• preciso = I need

So:

• preciso levar o carro
• eu preciso levar o carro

Both are correct.

The version without eu is very common and usually sounds more natural unless the speaker wants extra emphasis or contrast.

For example:

• Eu preciso levar o carro, mas ele não precisa.

Here eu is useful because it contrasts with ele.

Yes. Portuguese allows some flexibility.

Possible versions include:

• Seja hoje, seja amanhã, preciso levar o carro.
• Preciso levar o carro, seja hoje, seja amanhã.
• Hoje ou amanhã, preciso levar o carro.
• Preciso levar o carro hoje ou amanhã.

These all express a similar basic idea, but the emphasis changes slightly.

• Putting seja hoje, seja amanhã first highlights the alternatives before the main statement.
• Putting preciso levar o carro first highlights the obligation first.
• Using hoje ou amanhã sounds simpler and more conversational.

Yes. It is a general pattern and can be used with many kinds of alternatives.

For example:

• Seja de carro, seja de ônibus, vamos chegar lá.
  = whether by car or by bus, we’ll get there

• Seja no trabalho, seja em casa, ele está sempre ocupado.
  = whether at work or at home, he is always busy

• Seja fácil, seja difícil, vou tentar.
  = whether it’s easy or difficult, I’m going to try

So the learner should remember it as a useful structure:

• seja X, seja Y = whether X or Y

Yes. The sentence suggests that the exact day is still open, but the need to take the car is fixed.

That is the key nuance of seja hoje, seja amanhã:

• the option may vary
• the obligation does not

So the sentence does not just list two days. It gives the feeling of:

• one way or another, I need to take the car

That is why this structure can sound stronger or more nuanced than a plain hoje ou amanhã.