it belongs to the verb to be (ser o estar)...e.g. El esinteligente
she is queen = Ella es la reina
"Si es, es" is Spanish for "If it is, it is". If you just mean "si es", that means "if it is". If you mean "Sí es" (with an accent on "Sí"), it means "Yes, it is".
"Es" and "son" mean "is" and "are" in Spanish.
Es - Is
The light in the oven
do you mean dutch oven
quis es means "who are you?"
¿Qué es tu reina negra?
"Qué es" means "what is". "Quién es" means "who is."
Mañana es. = Tomorrow it is.
Es means "it" in English.
no = no and es means is