Yo agrego agua fría al café.

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Breakdown of Yo agrego agua fría al café.

• el café: the coffee
• a: to
• el agua: the water

Questions & Answers about Yo agrego agua fría al café.

Why is yo used at the beginning of the sentence? Is it necessary?

The subject pronoun yo is optional in Spanish because the verb ending -o already shows first-person singular. It’s included here for emphasis or clarity, but you can drop it: Agrego agua fría al café.

What does agrego mean, and why not agrega or agregas?

Agrego is the first-person singular present form of agregar (“to add”), meaning “I add.”

• Agrega = third person singular (“he/she adds” or formal “you add”).
• Agregas = second person singular informal (“you add”).

Can I use añadir instead of agregar?

Yes. Añadir is a common synonym for agregar, especially in recipes or formal contexts. Both mean “to add.” For example, Yo añado agua fría al café is perfectly correct and means the same thing.

Why is there no article before agua fría but there is al before café?

When you talk about a substance in general (“cold water” as an unspecified quantity), Spanish often omits the article: agua fría.
The coffee, however, is specific (“the coffee I have”), so you use the definite article el, which contracts with a to form al: al café.