doesn't know
María no conoce a sus vecinos.
María doesn't know her neighbors.
He/She doesn't know my brother.
Tom no conoce a nadie en nuestro colegio.
Tom doesn't know anyone at our school.
Él no conoce a ninguno de sus dos hermanos.
He doesn't know either of his two brothers.
Mi novio todavía no conoce a mis padres.
My boyfriend still hasn't met my parents.
Órale, ¿oiga y no conoce a nadie que esté en eso de la música?
Wow, hey, do you know anyone who’s in the music business?
— Rudo y Cursi (2008)
Tom no conoce a ninguno de los amigos de María.
Tom doesn't know any of Maria's friends.
Tom dijo que no conoce a nadie en Boston.
Tom said he doesn't know anyone in Boston.