Sábado vou correr no parque.

On Saturday I am going to run in the park.

Breakdown of Sábado vou correr no parque.

• ir: to go
• em: in
• correr: to run
• o parque: the park
• sábado: Saturday

Questions & Answers about Sábado vou correr no parque.

Why is there no preposition before Sábado? In English we say “On Saturday.”

In Portuguese it’s common, especially in spoken or informal contexts, to drop em or no when the day of the week starts the sentence.
Equivalent to “On Saturday, I’m going to run in the park,” but more concise.
You can also say No sábado vou correr no parque for a slightly more formal or explicit version.

Why is Sábado capitalized here? I thought Portuguese days of the week were lowercase.

You’re right: in Portuguese, days of the week are normally lowercase (segunda-feira, terça, sábado, etc.).
Here Sábado is capitalized simply because it’s the first word of the sentence. Otherwise it would be sábado.

Why isn’t eu included before vou? In English I’d say “I’m going to run.”

Portuguese is a pro-drop language: the verb ending -o in vou already shows first-person singular.
Adding eu is grammatically correct (Eu vou correr), but speakers often omit it unless they need emphasis.

What tense is vou correr? Why not just use the simple future like correrei?

Vou correr is the periphrastic future, formed with the present of ir + infinitive. It expresses a planned or near-future action (“I’m going to run”).
The simple future (correrei) exists but is more formal and less common in everyday speech.

Why isn’t it vou a correr, like Spanish voy a correr?

Portuguese standardly uses ir + infinitive directly (vou correr).
The equivalent ir a + infinitive is either literary/archaic or regional for continuous actions, but it’s not used as the default future marker.
For most speakers and contexts, vou correr is the natural choice.

What form of the verb is correr, and why isn’t it conjugated here?

Correr is in the infinitive (“to run”). After a conjugated verb like vou, Portuguese grammar requires the second verb to remain in the infinitive form.

Why is it no parque and not em parque or na parque?

1. parque is masculine singular, so the article is o.
2. You contract em
   • o = no.
3. You need the definite article with location nouns:
   • no parque (correct)
   • na parque would imply a feminine noun (there is none)
   • em parque (without article) is ungrammatical in this context.

How would I specify “next Saturday” instead of just “Saturday”?

Add a qualifier:
• No próximo sábado vou correr no parque (“Next Saturday…”)
• Or more colloquially: No sábado que vem vou correr no parque.
Without such qualifiers, Sábado in context usually means the coming Saturday.