Eu vou cortar a cebola para a sopa.

In Brazilian Portuguese, ir + infinitive is a very common way to talk about the future.

• vou cortar = I am going to cut / I will cut
• literally: I go to cut

There is also a simple future form:

• cortarei a cebola

But in everyday speech, Brazilians usually prefer vou cortar because it sounds more natural and conversational.

You can often leave out eu.

Portuguese verbs usually show who the subject is, so:

• Eu vou cortar a cebola para a sopa
• Vou cortar a cebola para a sopa

Both are correct.

Including eu can add emphasis, contrast, or clarity. In normal conversation, dropping it is very common.

Portuguese often uses the definite article where English might not.

So a cebola means the onion. In many everyday situations, Portuguese prefers the article with concrete nouns like food items, body parts, and common objects.

If you said just cebola, it could sound less natural in this sentence unless you were speaking in a more general or list-like way.

Because cebola is a feminine noun in Portuguese, so it takes the feminine article a:

• a cebola = the onion

This is grammatical gender, not biological sex. Many nouns just have to be learned with their gender.

A useful habit is to memorize nouns with their article:

• a cebola
• o tomate
• a sopa

Here para a sopa means something like:

• for the soup
• for making the soup
• to use in the soup

It shows purpose. The onion is being cut so it can go into the soup.

So the sentence is not just about cutting an onion in general. It implies a reason: the onion is being prepared as part of the soup.

Because sopa is being treated as a specific soup: the soup.

• para a sopa = for the soup

Portuguese often uses articles more than English does. Even when English might say for soup in some contexts, Portuguese commonly says para a sopa if the speaker has a particular soup in mind.

Yes. In spoken Brazilian Portuguese, para a is very often reduced to pra.

So these are equivalent:

• para a sopa
• pra sopa

Para a sopa is the fuller, more formal spelling. Pra sopa is very common in speech and informal writing.

Yes, cortar is correct and natural. It means to cut.

Depending on the situation, Brazilians might also use more specific verbs, such as:

• picar a cebola = to chop the onion
• fatiar a cebola = to slice the onion

So:

• vou cortar a cebola = general
• vou picar a cebola = more specifically I’m going to chop the onion

A rough English-friendly guide is:

• eh-ooh voh kohr-TAR ah seh-BOH-lah PAH-rah ah SOH-pah

A few helpful points:

• eu often sounds a bit like eh-ooh said quickly
• vou sounds roughly like voh with a glide
• r at the start of a word is often like an English h, but in cortar the r at the end is softer and varies by region
• unstressed final a often sounds closer to uh in Brazilian Portuguese

This is only an approximation, but it can help you get started.

Yes. In many contexts, vou cortar can be translated as either:

• I’m going to cut
• I will cut

The exact English translation depends on context. Portuguese does not always separate those meanings the same way English does.

So in this sentence, Eu vou cortar a cebola para a sopa could work in situations like:

• announcing your next action
• making a simple plan
• offering to do it

The structure is:

• Eu = subject
• vou cortar = future expression / verb phrase
• a cebola = direct object
• para a sopa = purpose phrase

So the pattern is basically:

Subject + verb phrase + object + purpose

This is very similar to English word order, which makes the sentence fairly straightforward for English speakers.

Yes. English often adds up in verbs like cut up, but Portuguese usually just says cortar unless a more specific action needs to be emphasized.

So cortar a cebola can cover:

• cut the onion
• cut up the onion

If you want to be more specific, you could use another verb like picar for chop.