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él demostró

showed, demonstrated, proved

→ demostrar
de removal or reversal + mostr show + ó 3rd person singular past tense
verb · third singular · past indicative Rare #39,543
showed, demonstrated, proved Simple past (preterite): he/she/it demonstrated; you (formal) demonstrated.
SP: Ella demostró que tenía razón.
EN: She proved that she was right.
Conjugation of demostrar
Indicative past
SingularPlural
Third demostró —

Al final demostró que tenía vida dentro.

In the end he showed that he had life inside.

La prueba de ADN demostró que él era inocente.

The DNA test proved that he was innocent.

Demostró ser honesto.

He proved to be honest.

Lo demostró, compañero coronel.

You proved it, Colonel.

— El brazo de brillantes (1969)

Cristóbal Colón demostró que el mundo no es plano.

Christopher Columbus demonstrated that the world is not flat.

El bombero demostró cómo apagar el fuego.

The firefighter demonstrated how to put out the fire.