Learn French: Il a caché le vin dans une cave.

The preposition chez is only used with people, meaning at the home or workplace of someone (like chez le dentiste). Because une cave is a physical place or object and not a person, we must use dans (in or inside) instead.

Does une cave mean a cave in English?

No, this is a classic false friend! In French, une cave means a cellar or basement, especially one used for storage. A natural rock cave out in the wilderness is called une grotte.

How does the past tense work in a caché?

This is the passé composé (past tense), meaning hid or has hidden. It uses the present tense of avoir (il a) as a helping verb, followed by the past participle of the verb cacher (caché).

Do I pronounce the s at the end of dans?

Normally the s at the end of dans is silent. However, because the next word (une) starts with a vowel, you make a spoken connection called a liaison. The s links directly to the u and makes a z sound.