ABSTRACT
This chapter describes those aspects of verbal inflection that can be accounted for by means of paradigmatic properties, that is, whenever the presence of a specific exponent in an inflected form can be explained taking into account the distribution inside the paradigm of the forms that actually materialize the morphosyntactic properties of the Spanish verb. It defines the conjugation classes. The chapter deals with Spanish irregular verbs and describe the different types of irregularities and their main formal features. The expression of tense has served in the Spanish grammatical tradition to organize the collection of different verbal forms in a series of closed paradigms, which are therefore called tiempos verbales. In Spanish verbal inflection, regularity is a property assigned to verbs whose paradigms include forms resulting from the combination of regular or typical constituents. These regular constituents are so called because they are widely distributed throughout the inflection system.
