“…The notion of category could be broadened to include also constructions (which are just complex syntactic categories with specific properties), such as ditransitive constructions (Haspelmath 2005), non-verbal predicative constructions (Stassen 1997), relative clauses (Lehmann 1984), or noun phrases (Rijkhoff 2002), as well as phonological categories such as velar nasals (Anderson 2005) or stress (Goedemans & van der Hulst 2005). At a more abstract level, general notions such as sentence, clause, phrase, word, clitic, affix, stem, root, inflection, syllable, diphthong, consonant must also be regarded as (highly abstract) categories of language form, though it is less obvious that typology has made significant contributions to understanding them.…”