Eu tenho que empurrar o carro quando ele para na rua.

Yes. Ter que is a very common way to express obligation in Brazilian Portuguese.

• Eu tenho que empurrar o carro = I have to push the car

Other common ways to express a similar idea are:

• Eu tenho de empurrar o carro = also I have to push the car
• Eu devo empurrar o carro = I should / I ought to push the car or sometimes I must, depending on context

In everyday Brazilian Portuguese, ter que is extremely common and natural.

Because after tenho que, Portuguese uses another verb in the infinitive.

So the pattern is:

• ter que + infinitive

Examples:

• Tenho que estudar = I have to study
• Tenho que sair = I have to leave
• Tenho que empurrar o carro = I have to push the car

Here:

• tenho = I have
• que = part of the obligation structure
• empurrar = to push

Yes. That is very common.

Portuguese often leaves out the subject pronoun when the verb already makes the subject clear.

• Eu tenho que empurrar o carro...
• Tenho que empurrar o carro...

Both are correct.

Including eu can add emphasis, contrast, or clarity. In normal conversation, Brazilians often omit it unless they want to stress I.

Portuguese uses definite articles more often than English.

So o carro literally means the car, but in many situations Portuguese sounds more natural with the article even where English might be more flexible.

Examples:

• Vou lavar o carro = I’m going to wash the car
• Preciso vender o carro = I need to sell the car

In this sentence, empurrar o carro is the normal way to say push the car.

Here, ele refers to o carro.

Since carro is a masculine singular noun, the pronoun used to refer back to it is ele.

So:

• o carro = the car
• ele = it / he, but here it means it, referring to the car

Portuguese often uses ele/ela where English would use it for objects.

It usually does mean he, but Portuguese does not have a separate everyday subject pronoun exactly like English it.

So ele and ela can refer to things as well as people, depending on the noun’s gender.

Examples:

• O carro está velho. Ele quebra muito. = The car is old. It breaks down a lot.
• A porta está aberta. Ela está emperrada. = The door is open. It is jammed.

So in your sentence, ele = the car / it.

Good question. In this sentence, para is not the preposition for/to. It is the verb parar conjugated in the present tense.

• parar = to stop
• ele para = it/he stops

So:

• quando ele para na rua = when it stops in/on the street

This can confuse learners because para can also be the preposition for/to. Context tells you which one it is.

Compare:

• Este presente é para você. = This gift is for you.
• O carro para na rua. = The car stops in the street.

Under older spelling rules, many people wrote the verb form with an accent: pára. After the spelling reform, that accent was removed in standard writing.

So today:

• para can mean the preposition for/to
• para can also be the verb form stops

Context tells you the meaning.

In your sentence, because it follows ele, it is clearly the verb:

• ele para = it stops

Na is a contraction of:

• em + a = na

So:

• na rua = literally in the street
• depending on context, it may be translated as in the street or on the street

Examples:

• Estou na rua. = I’m in the street / I’m out on the street
• O carro para na rua. = The car stops in the street

English and Portuguese do not always match perfectly with prepositions, so it is best to learn na rua as the normal expression here.

Because this sentence is describing a habitual or repeated situation.

• quando ele para na rua = when it stops in the street / whenever it stops in the street

The present indicative is natural when talking about something that happens regularly.

If you were talking about a specific future event, Portuguese would often use the future subjunctive:

• Quando ele parar na rua, vou empurrá-lo.
• When it stops in the street, I’ll push it.

So:

• quando ele para = habitual/repeated
• quando ele parar = future event

Usually it sounds like a repeated or general situation.

• Eu tenho que empurrar o carro quando ele para na rua. = I have to push the car when/whenever it stops in the street.

The present tense in Portuguese often works like this for habits, routines, and repeated events.

If you wanted one specific past event, you would use a different tense:

• Eu tive que empurrar o carro quando ele parou na rua.
• I had to push the car when it stopped in the street.

Yes.

Both are correct:

• Eu tenho que empurrar o carro
• Eu tenho de empurrar o carro

In Brazilian Portuguese, ter que is usually more common in everyday speech. Ter de may sound a little more formal or careful in some contexts, but both are perfectly normal.

Yes, empurrar basically means to push.

In this sentence it means physically pushing the car:

• empurrar o carro = to push the car

It can also be used in other ways, depending on context:

• empurrar a porta = push the door
• empurrar alguém = push someone

Sometimes it can be used figuratively too, but the literal meaning is the main one here.

Tenho has a nasal sound, which is very common in Portuguese.

A rough English-friendly guide is:

• TEN-yo, but with the first syllable nasalized

Important points:

• nh sounds like the ny in canyon
• the vowel in ten- is nasal, so it is not a plain English teh

So tenho is not pronounced like ten-ho. The nh works together as one sound.

Yes, absolutely.

Both are correct:

• Eu tenho que empurrar o carro quando ele para na rua.
• Eu tenho que empurrar o carro quando o carro para na rua.

Using ele avoids repetition and sounds more natural in many cases. Repeating o carro is grammatically fine, but it may sound less smooth unless you want extra clarity.

The structure is:

• Eu = subject
• tenho que empurrar = verb phrase expressing obligation
• o carro = direct object
• quando ele para na rua = time clause

So more literally:

• Eu = I
• tenho que = have to
• empurrar = push
• o carro = the car
• quando = when
• ele = it / the car
• para = stops
• na rua = in/on the street

That gives:

• I have to push the car when it stops in the street.