One of the fundamental assumptions of formal linguistics is that the relations between sentence types can be expressed derivationally. This assumption is called into question with reference to the derived intransitive construction in English and certain subjectivization constructions in Xhosa where no such derivational relation with a base structure is possible. It is then argued that these structures as well as the structures between which more transparent relations are reputed to exist, should be accounted for in terms of nonformal cognitive notions such as those proposed in schema theory.
In contemporar?' cogiiitive~unctioiial approaches to major lexical word categoriesl the notion ofcontinuum is veiy much in evidence in the internal organi.sation of each qf the major categories N(oun) and V(erh), yet the.se two cutegorie,s are still regarded as separate and independent categorial entities. In our exploration of the interrelations between these lexical categories in Zulu we have found that even though protoppes of the muior categories N(oun) and V(erh) are essentially independent the), are actually linked to one another on a continuum where the tmditional Bantu categoty A(diective) pla-vs a significant role as central categol?' linking the N(oun) and V(erh) categories. Hence, we conclude that protoQpica1 N(oun) and V(erb) are not independent discrete categories, hut rather extreme poles on a continuum of 1e.xical categories. lit kontemporire kogniti&iunksionele henaderings tot die interne organisasie van ondcrskcidelik die primire leksikale kategoriee N(omina) en V(erba) staan die hegrip kontinuum sentraal. Nogtans word die prinidre kategoriee nog steeds as onderling onajhanklike en diskrete kategoriei gesien. In ons ondersoek van die interrelasies tussen die prinzlre leksikale kategoriei met verwtvsing na Zulu het om hevind dat alhoewel prototipes van die kategoriee N(omina) en V(erba) in wese onajl~anklike is word Izulle tog aan mekaar geskakel op 'n kontinuum. Op hierdie kontinuum vorm die tradisionele Bantukategorie A(djektiej die seiitrale .skakel tussen die twee ekstreme kategoriee. Vandaar die gevolgtrekking dat N(omina) en V(erha) nie diskrete onajhanklike kategorie2 is nie, maar we1 ekstreme pole op '11 kontinuum van leksikale kategoriei. S. Aji: Tvdskr. Taalk., Suppl. 20 ISSN 1018-7820 215 Word categories in Southern Bantu
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