Present Tense
Regular -ir verbs (such as vivir) follow a very similar pattern to that of regular -ar and -er verbs: You must first remove the ending (in this case, -ir) from the verb stem. For the regular -ir verb vivir, the verb stem is viv-. Next, simply add the ending that agrees with the subject of the sentence. Regular infinitive verbs that end in -ir follow this conjugation pattern: