The Local Way to Say It
In Madrid, when you're navigating the bustling streets or ordering a tapa, you'll constantly hear demonstratives. Locals use them to point out specific things or refer back to something already mentioned, often with a flick of the wrist! The key is whether the word describes a noun or replaces it entirely. For example, if you're in a bar in Lavapiés and want a specific coffee, you might say, "Quiero este café" (I want this coffee), with este modifying 'café'. But if the waiter already knows you're talking about coffee, you might simply say, "Quiero este" (I want this one), where este stands alone, replacing 'café'. Another example: "¿Te gusta esta camisa?" (Do you like this shirt?) versus "No me gusta esa, prefiero aquella" (I don't like that one, I prefer that one over there). It’s all about context and whether a noun is present!The 'Grammar Math'
Think of it as simple 'grammar math'. Demonstrative adjectives always accompany a noun, telling you 'which one'. They agree in gender and number with the noun they modify.Formula: Adjective + Noun.
Examples: Este libro (This book), Estas calles (These streets).
Demonstrative pronouns, on the other hand, replace the noun. They stand alone and act as the subject or object of a sentence.
Formula: Pronoun (alone).
Examples: ¿Cuál quieres? Este (Which one do you want? This one), Prefiero aquella (I prefer that one over there).
While the RAE no longer mandates accents for pronouns unless ambiguity arises, many still use them to visually distinguish: éste, ésta, éstos, éstas for pronouns versus este, esta, estos, estas for adjectives. There are also neuter pronouns: esto, eso, aquello, which never carry an accent and refer to abstract ideas or unknown things.