Quiero comprar unas botas para el invierno.

I want to buy some boots for the winter.

Breakdown of Quiero comprar unas botas para el invierno.

• yo: I
• querer: to want
• para: for
• comprar: to buy

Questions & Answers about Quiero comprar unas botas para el invierno.

Why is it quiero and not yo quiero?

In Spanish, the subject pronoun is often omitted because the verb ending already tells you who the subject is.

• quiero = I want
• The -o ending shows it is yo

So Quiero comprar... is completely natural and very common. You can say Yo quiero comprar..., but that usually adds emphasis, such as I want to buy them.

Why is comprar in the infinitive?

After quiero (I want), Spanish usually uses an infinitive, just like English often does:

• Quiero comprar = I want to buy
• Quiero comer = I want to eat
• Quiero salir = I want to go out

So quiero comprar is a standard verb pattern: querer + infinitive.

Why does the sentence use unas botas instead of just botas?

Unas is the feminine plural form of the indefinite article, so here it means some or a pair of, depending on context.

• unas botas = some boots / a pair of boots
• botas alone = boots in a more general sense

Both can be possible, but unas botas sounds very natural when talking about buying a specific item.