On this page you can review the conjugations of 101 Spanish verbs, grouped according to their conjugation patterns or spelling-phonetic rules. Included are the most commonly used 52 completely irregular verbs (those whose root and/or endings change in more than one verb form) and 17 semi-irregular verbs (those that require a change in a given vowel or consonant to be pronounced correctly), as well as the auxiliary verbs HABER and SER.