Grammatical relations, particularly the notions of transitivity, case marking, ergativity, passive and antipassive have been a favourite subject of typological research during the last decade, but surprisingly, the notion of valency has been of marginal interest in cross-linguistic studies, though the syntactic and semantic status of participants is, to a great extent, determined by the relational properties of the verb. Valency is the property of the verb which determines the obligatory and optional number of its participants, their morphosyntactic form, their semantic class membership (e.g. ± animate, ± human) ,and their semantic role (e.g. agent, patient, recipient). The valency inherently gives information on the nature of the semantic ...