vs
QUICK ANSWER
"Está aquí" is a form of "está aquí", a phrase which is often translated as "he's here". "Si" is a form of "si", a conjunction which is often translated as "if". Learn more about the difference between "está aquí" and "si" below.
está aquí(
ehs
-
tah
ah
-
kee
)A phrase is a group of words commonly used together (e.g., once upon a time).
a. he's here (masculine)
¿Ha llegado ya Carlos? - Sí, está aquí, ¿quieres hablar con él?Has Carlos arrived yet? - Yes, he's here. Do you want to speak with him?
c. it's here
¿Has visto mi libro electrónico? - ¡Está aquí, en el dormitorio! ¿Te lo llevo?Have you seen my ebook? - It's here, in the bedroom! Shall I bring it to you?
d. is here
Rosa está aquí. Ha venido a pasar unos días con nosotros.Rosa is here. She's come to spend a few days with us.
2. (formal) (second person singular)
A word or phrase used to refer to the second person formal “usted” by their conjugation or implied context (e.g., usted).
a. you're here
¡Ah, está todavía aquí! Pensé que se había ido.Ah, you're still here! I thought you'd left.
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).
