Vou colocar o vaso na mesa.

In Portuguese, subject pronouns are often omitted when the verb already makes the subject clear.

• Vou already tells you the subject is I
• So (Eu) vou colocar o vaso na mesa and Vou colocar o vaso na mesa both mean the same thing

Including eu is possible, but it usually adds emphasis or contrast.

Vou colocar is a very common future expression in Portuguese:

• vou = I go
• colocar = to put / to place

Together, ir + infinitive means something like I’m going to put.

This is one of the most common ways to talk about the near future in Brazilian Portuguese.

You can say colocarei, but in everyday Brazilian Portuguese, vou colocar is much more common and natural in conversation.

Compare:

• Vou colocar o vaso na mesa. = very common, conversational
• Colocarei o vaso na mesa. = correct, but often more formal or less common in speech

So learners should get very comfortable with ir + infinitive.

Portuguese uses definite articles much more often than English.

So where English might say put the vase on the table, Portuguese naturally says:

• o vaso = the vase
• a mesa = the table

Leaving out the article is often impossible or changes the meaning.

Because Portuguese usually contracts the preposition em with the article a:

• em + a = na

So:

• na mesa = in/on the table, depending on context

Other common contractions:

• em + o = no
• de + a = da
• de + o = do
• a + a = à

This is a very common point for English speakers.

In Portuguese, em can cover meanings that English separates into in, on, and sometimes at, depending on context.

So:

• na mesa often means on the table

If you want to be extra explicit about physical position on top of the table, you can also say:

• em cima da mesa = on top of the table

But na mesa is very natural in many situations.

Yes, both are possible.

• colocar = to put / to place
• pôr = to put

In Brazilian Portuguese, colocar is often easier for learners because it is regular and very common.
Pôr is also common, but it is irregular.

So:

• Vou colocar o vaso na mesa.
• Vou pôr o vaso na mesa.

Both are correct. Colocar may sound slightly more neutral or straightforward for learners.

Yes, but the original order is the most neutral and natural:

• Vou colocar o vaso na mesa.

You might also hear:

• Vou colocar na mesa o vaso.

But that version is less neutral and may sound marked, poetic, or focused differently depending on context.

For learners, the safest pattern is:

verb + object + place

Not always. Vaso can have several meanings depending on context.

Common possibilities include:

• vase
• plant pot
• in some contexts, part of the expression vaso sanitário = toilet

In o vaso na mesa, the context strongly suggests a vase or decorative container, not a toilet.

So context matters a lot with this word.

A simple approximation is:

voh koo-loh-CAR oo VAH-zoo nah MEH-zah

A few notes:

• vou sounds roughly like voh/voo with a glide
• colocar has stress on the last syllable: co-lo-CAR
• vaso has stress on va
• mesa has stress on me

In many Brazilian accents:

• o at the end of a word may sound like oo
• a at the end may sound softer, almost like uh

So vaso may sound a bit like VAH-zoo.

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

• I’m going to put
• I will put

The exact English choice depends on the situation, not just the grammar.

Portuguese often prefers vou + infinitive where English might choose either future form.

Yes. Portuguese nouns have grammatical gender, and the articles must match.

• o vaso: masculine noun, so it takes o
• a mesa: feminine noun, so it takes a

That is also why em + a mesa becomes na mesa.

So the gender affects both the article and the contraction.