22 , 2015-09-28 , 金沢大学大学院人間社会環境研究科 = Graduate School of Human and Socio-Enviromental Studies Kanazawa University
This paper proposes that tag questions have a recursive structure as a portion of fractal organization based on anchoring (Langacker 2009, to appear), which is reflective of their function for reanalysis and implies cognitive mode shift (Nakamura 2012) motivated by intersubjectivity (Verhagen 2007). This paper discusses how instances of tag questions can be extended and why they are used in discourse. Interlocutors move their focus of attention from the conception of reality to epistemic status because they are concerned with eliminating the difference between them. A total of 4,000 instances from the British National Corpus show that about 70% of them match the typical structure - [Proposition + anaphoric CORE] - but other types, which have mainly two patterns, can also be seen. One has non-anaphoric pronouns, and the other has non-clausal propositions. This paper concludes that the former pattern is analyzed in terms of intersubjectivity while the latter shows a shift from I-mode to D-mode. Because speakers share their intention of speaking with interlocutors, tag questions, which are extensions of non-anaphoric and non-clausal use, use an interactive system at the end of sentences.