Sí. Lo sé.
already Know - ya se
Like in "I know, I know"? = "Ya lo sé"
Ya lo sé (I already know - that thing, idea, fact, concept) Ya lo conozco (I already know - that person)
You say, "Ya he comido."
(Él) ya falleció / ha fallecido. *Omit "él" if you know who the person is.
"I already know" in Spanish is "Ya lo sé". It is pronounced "yah low say". Please see this site for confirmation of the translation: http://www.answers.com/library/Translations
¿Ya comiste? or ¿Ya comío?
"Ya no mas"
Ya termine.
Acaba ya!
Ya empezado
Ya basta