These verbs are almost regular. Only past participle is irregular.

abrir - to open - abierto

cubrir - to cover - cubierto

describir - to describe - descrito

descubrir - to discover - descubierto

escribir - to write - escrito

Most of the verb conjugations including English translation used in this website are based on Fred Jehle's Spanish Verb Database which was compiled by Brian Ghidinelli.