Like all the Romance languages, Catalan verbal inflection is more complex than the nominal. <answer>Suffixation</answer> is omnipresent, whereas morphological alternations play a secondary role. Vowel alternances are active, as well as infixation and suppletion. However, these are not as productive as in Spanish, and are mostly restricted to irregular verbs.
What plays a primary part in Catalan?
Suffixation