to be ... to you, to be ... for you
To be honest, I don't know.
— Buena suerte, diviértete, no mueras (2026)
Aunque para serte franco, está cada vez menos poderosa la moto.
Though, to be honest, the bike is getting less and less powerful.
— Diarios de motocicleta (2004)
Para serte franco, así es como sucedió.
To be honest, that's how it happened.
Para serte sincera, nunca un ciego había querido irse de intercambio.
To be honest, a blind person had never wanted to go on an exchange program before.
— Hoy Quiero Volver Solito (2014)
Quiero ser tu esposa y serte fiel.
I want to be your wife and be faithful to you.
— La dolce vita (1960)