A verb is the kind of word that can be modified to match the person , he number , he weather , he mode and the appearance that has the subject of which he speaks. Originating in the Latin term verbum, the verb is the element of a sentence that gives the pattern of existence and describe a action or state that influences the subject. It is the core of a structure that can mark the division of the subject and the predicate.

Basically we can say that the verb is the one that indicates what action the grammatical subject of a sentence performs and that it can express moods, feelings, actions, attitudes or states . The verb can be indicated by a term that determines action in the case of the active voice or as a complement in the case of the passive.
The verbs can be classified in many ways, such as: from a morphological point of view they can be regular or irregular, from the temporal duration of the actions, perfect or imperfective, according to the contribution of meaning they offer can be copulative, semicopulative, predicative , transitive, reciprocal, reflexive, intransitive or pronominal; If they serve to support the meaning of other verbs, they are called auxiliary.
To name a few definitions: Transitive verbs they are those that demand the existence of a direct object to reach a complete meaning; the intransitive instead, they do not need a direct object in the sentence that conditions the verb; the irregular verbs they possess particular conjugations for primitive verb tenses such as the present in the indicative way, the simple past perfect of the indicative and the simple future in the same way; the regular verbs they are, on the contrary, those that respect the conjugation systems most used in the language to which they belong. Other types of verbs are the personal , he impersonal , he third person , he defective and the copulative .
The use of a verb within a sentence is called conjugation In some languages, verbs are always used infinitively and verbal tense is interpreted with the help of certain particles, in Spanish all verbs must be conjugated to know the real meaning they possess. It is essential, therefore, that the verb adapt to the rest of the words so as not to clash in gender or in person or number against the arguments or complements. If we analyze the Spanish language, for example, we will notice that the subject always agrees in number and in most cases in the person variable (except for the so-called inclusive subject).
Those languages where the verbs conjugate are called flexible . Each determines a type of conjugation pattern , which differs from one linguistic system to another. In Spanish, most verbs are conjugated on a regular basis according to three established patterns based on the thematic vowel .
In our language to make a correct conjugation of verbs it is important to keep in mind that in the form singular there are three people (me-you-he / she) and in the plural three others (we-you / you-they), some of those forms share the conjugation particles (not in all cases) others do not. It is important to clarify that the moment in which the action occurs is one of the determinants of said conjugation.