would be (of age), would have
De seguir con vida, tendría tu edad; pero está muerto.
If he were still alive, he would be your age; but he is dead.
— Señora venganza (2005)
Querían saber, les dije que los tendría informados y lo he hecho.
They wanted to know; I told them I would keep them informed, and I have done so.
— Juno: Crecer, correr y tropezar (2007)
Mary le anunció a Oliver que él pronto tendría una nueva hermana.
Mary announced to Oliver that he would soon have a new sister.
Tomás pensó que tendría todo el tiempo que necesitase.
Tomás thought he would have all the time he needed.
Bien, tengo que decírselo, tendría mucho, mucho cuidado antes de hablar de ello.
Well, I have to tell him—I’d be very, very careful before talking about it.
— El Club de la Pelea (1999)