The Catalan language, like many Romance languages, has a rich and complex verb system. Verbs in Catalan are very important in forming sentences and conveying meaning. They provide information about tense, aspect, mood, and person.

Catalan verbs are classified into three conjugations based on their infinitive endings (-ar, -er, -ir). Each conjugation has its own set of regular verb endings that are used to form different verb tenses. However, there are also irregular verbs that don’t follow these patterns and must be memorized individually.

Verbs in Catalan have six main tenses: present, past, imperfect, future, conditional, and past perfect. Each tense has different forms depending on the subject pronoun used. Additionally, Catalan has various auxiliary verbs that are used in compound verb tenses.

In terms of mood, Catalan verbs can be indicative, subjunctive, or imperative. The indicative mood is used to state facts or express certainty, while the subjunctive is used to express doubt, wishes, or hypothetical situations. The imperative mood is used to give commands or make requests.

Understanding verb theory in Catalan grammar is crucial for learners to be able to construct sentences correctly and accurately convey their thoughts and actions.