he estudiado

El examen es mañana y todavía no he estudiado nada.

The exam is tomorrow and I haven't studied anything yet.

He estudiado con el Maestro siglos antes que tú.

I studied with the Master centuries before you.

— Ne Zha (2019)

Creo que no he estudiado lo suficiente.

I don't think I've studied enough.

Este semestre no he estudiado mucho física.

I haven't studied much physics this semester.

He estudiado historia de la música.

I have studied music history.

— Casi famosos (2000)

Mi vida parece un examen para el que no he estudiado.

My life feels like an exam I haven’t studied for.

No lo he estudiado con tanto cuidado.

I haven't studied it that carefully.

— Sacrificio (1986)

He estudiado chino mucho tiempo, pero no lo hablo con fluidez.

I've studied Chinese for a long time, but I don't speak it fluently.

He estudiado los cómics a fondo.

I have studied comics thoroughly.

Estoy cansado porque he estudiado mucho.

I am tired because I have studied a lot.