tú creyeras

believed

→ creer
crey to believe, to think + eras you (informal) imperfect subjunctive
verb · second singular · imperfect subjunctive Rare #48,249
believed Imperfect subjunctive form, used with tú or vos; often translated as “were to believe” depending on context.
SP: Si creyeras en mí, todo sería más fácil.
EN: If you believed in me, everything would be easier.
Conjugation of creer
Subjunctive imperfect
SingularPlural
First creía creíamos
Second creías —
Third creía creían

Estás hablando como si le creyeras.

You're talking as if you believe him.

— El hombre de la Tierra (2007)

Para que así me creyeras.

So that you would believe me.

— Hero (2002)

Ahora estás hablando como si tú le creyeras.

Now you're talking as if you believe him.

— El hombre de la Tierra (2007)

He dejado que creyeras que soy un hombre libre.

I've let you believe that I'm a free man.

— Divorcio a la italiana (1961)