Learn Hardcore Spanish (Latin America): El coleccionista guarda monedas antiguas en un álbum. - The collector keeps old coins in an album.

We use the definite article El because we’re referring to a specific collector that both speaker and listener have in mind. If you wanted to introduce any collector in a general sense, you would say Un coleccionista.

What does guardar mean in this context?

Here guardar means to keep or to store items safely for preservation. In other contexts it can also mean to save (as in saving a file).

Why is guarda used here? Which person and tense is it?

Guarda is the third person singular present indicative form of guardar (él/ella/usted guarda). It agrees with El coleccionista (“he keeps”).

Why is the adjective antiguas placed after monedas? Can it go before?

Descriptive adjectives in Spanish typically follow the noun: monedas antiguas is the neutral word order. You can say antiguas monedas for stylistic emphasis or a poetic feel, but the standard order is noun → adjective.

How does antiguas agree with monedas?

Spanish adjectives must match the noun’s gender and number. Monedas is feminine plural, so the adjective takes the feminine plural form antiguas (from antiguo).

What does the preposition en indicate in en un álbum? Could I use another preposition?

Here en means in or inside, marking location. You could use dentro de un álbum for “inside an album” with more emphasis, but en is the common, concise choice.

Why does álbum have an accent on the á, and what is its plural form?

Álbum is a “llana” (stress on the penultimate syllable) ending in a consonant other than n or s, so it requires a written accent: álbum. Its plural is formed regularly as álbumes.