vs
QUICK ANSWER
"Si" is a form of "si", a conjunction which is often translated as "if". "Es tuyo" is a phrase which is often translated as "it's yours". Learn more about the difference between "si" and "es tuyo" below.
si(
see
)A conjunction is a word that connects words, phrases, clauses, or sentences (e.g., The cat and the dog slept.).
A masculine noun is used with masculine articles and adjectives (e.g., el hombre guapo, el sol amarillo).
es tuyo(
ehs
too
-
yoh
)A phrase is a group of words commonly used together (e.g., once upon a time).
1. (informal) (general)
A word or phrase used to refer to the second person informal “tú” by their conjugation or implied context (e.g., How are you?).
b. is yours
Este libro es tuyo. El mío está en mi mochila.This book is yours. Mine is in my backpack.