When should I use esto and èste?
I am unsure when to use the 2 forms of "this." I have the same question about the word "that."
You need the accents when you´re using the word as a pronoun, rather than an adjective.
In other words,
Este libro es rojo. (This book, this used as an adjective modifying book)
Éste es rojo. (This one, used as a pronoun = in place of a noun)
It works the same with "that".
Welcome to the forum, by the way, and good question.
esto is the neuter demonstrative pronoun - it is used when the noun it is referring to is unspecified, a category or an abstract concept. (other than a specific, concrete noun or person).
éste is the masculine demonstrative pronoun (used when its antecedent is a masculine noun).
No sé nada de esto.
I don't know anything about this.
Dame otro libro. Ya he leido éste.
Give me another book. I have already read this one.