Some conjugated verbs are irregular due to a stem-change from ‘e’ to ‘ie’ or ‘o’ to ‘ue’ or ‘e’ to ‘i’ or ‘u’ to ‘ue':
Some conjugated verbs are required to be irregular to keep the proper pronunciation as there are hard and soft c’s and g’s:
Verbs that end with “guar”: gu changes to gü in yo preterite, in present subjunctives and in commands (except tú affirmative). Example: averiguar – averigüé (yo preterite).
Some conjugated verbs are irregular to maintain proper stress with written accent mark:
Verbs that change from ‘i’ to ‘í’ when conjugated
Some conjugated verbs are just irregular:
Some verbs are almost regular – only a few irregular forms:
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.