Suppletion and dependency in inflectional morphology

Abstract

This paper presents a general approach to verbal inflection with special emphasis on suppletion phenomena. The paper focuses on French, but the approach is general enough to apply to a wide variety of languages. In the first part of the paper, we show that suppletion is not erratic: suppletive forms tend to always appear in groups, in definite areas of verbal paradigms. Our analysis is based on the observation of a number of dependency relations between inflectional forms of verbs (somewhat similar to rules of referral (Zwicky 1985, Stump 1993)). We define for each language a stem dependency tree based on these observations, which allows one to predict the whole paradigm of every verb in the language on the basis of a minimal number of idiosyncratic stems. We use the tree to minimize the quantity of redundant phonological information that has to be listed in the lexicon for a given lexeme, assuming that an optimal analysis of inflection should be able to derive all and only intuitively predictable inflectional forms from a single representation. The second part of the paper attempts to integrate the analysis in an HPSG hierarchical lexicon. Morphological dependency relations are represented directly by mentioning a lexical sign in another sign's lexical entry. The approach to suppletion proposed in the first part is made explicit using a combination of online type construction and default constraints on the phonology of dependent signs.