mostrabas
-you were showing
The word mostrabas is the imperfect form of mostrar in the second person singular. There are other translations for this conjugation.
See the full mostrar conjugation

mostrar

Caminaba por la oscuridad y tú me mostrabas la salida.
I walked in darkness and you showed me the way out.
Cuando llegaste te mostrabas muy activo.
You were very active when you came here that time.
mostrabas una, dos, tres, cuatro cartas, y yo...
You pull out the cards, you one, two, three, you draw four, I'm like...
He intentado como psiquiatra dirigirme a mi mismo con la integridad que tu mostrabas como policía.
I've tried as a psychiatrist to conduct myself with the integrity that you showed as a police officer.
Se lo mostrabas a tus amigos... a todo el mundo le gusta presumir, y decían, "Esto es genial, puedo tener uno?"
Then you showed it to your friends, cos everyone wants to show off, and your friends would say, "This is great, can I have one?"
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