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A distinctive and controversial feature of§Systemic-Functional Grammar, as theorised by Michael§Halliday, has been its analysis of formal units into§Theme and Rheme. It has been argued that the function§of sentence Themes is to expound the organising§principle, or method of development, of a text or§text-segment. This book reviews that claim and sets§out to test it empirically by examining sentence§Themes in a corpus of 80 short argumentative texts by§authors of four differing levels of linguistic and§rhetorical competence. Evidence for semantic§patterning in Theme is considered and compared with§evidence for comparable patterning in Rheme and§Subject. The research also investigates interaction§between Theme and other formal features of text§associated with discourse organisation, such as§definiteness, lexical cohesion, retrospective§labelling, prospection, and adverbial clauses with§extended discourse scope. The author concludes there§is little evidence that Theme has a privileged role§in expounding text structure. The book will appeal to§those interested in functional theories of grammar,§corpus-based approaches to written text analysis, and§composition instruction.
