366 Mostly Medieval 5. Conclusion In this article, ME so that has been shown to function as a subordinator of result and as a subordinator of purpose. As a result of the fact that both clauses of result and clauses of purpose convey a consequence of an earlier event, two types of clauses were shown where an interpretation either in terms of result or in terms of purpose was legitimate. If the understanding of the consequence as either intended by a main clause participant or not turns out to be the primary difference between a clause of result and a clause of purpose, ambiguous cases are bound to occur. The ambiguity between clauses of result and purpose facilitates reanalysis of the result subordinator so that as a purpose subordinator so that. Before, however, this development takes place, so that is first grammaticalized as a result subordinator. The arguments for this trajectory of development come from textual frequency and from the presence of two constructions likely to have set the grammaticalization in motion. References Cristofaro, Sonia (2003) Subordination. Oxford: Oxford University Press. Denison, David (1993) English Historical Syntax. London, UK: Longman. Denison, David (1998) “Syntax.” [In:] Suzanne Romaine (ed.) The Cambridge History of the English Language. Vol. 4. 1776–1997. Cambridge, UK: Cambridge University Press; 92–329. Fischer, Olga (1992) “Syntax.” [In:] Norman Blake (ed.) The Cambridge History of the English Language. Vol. 2. 1066–1476. Cambridge, UK: Cambridge University Press; 207–408. Fischer, Olga, Frederike Van der Leek (1981) “Optional vs Radical Reanalysis: Mechanisms of Syntactic Change.” [In:] Lingua 55; 301–349. Gelderen, Elly van (2008) “Linguistic Cycles and Economy Principle: The Role of Universal Grammar in Language Change.” [In:] Thórhallur Eythórsson (ed.) Grammatical Change and Linguistic Theory: The Rosendal papers. (Linguistik Aktuell/Linguistics Today 113). Amsterdam, The Netherlands | Philadelphia, PA: John Benjamins; 245–264. DOI: 10.1075/la.113.09gel Gelderen, Elly van (2009) “Renewal in the Left Periphery: Economy and the Complementizer Layer.” [In:] Transactions of the Philological Society 107(2); 131–195. DOI: 10.1111/j.1467-968X.2009.01216.x Gelderen, Elly van (2011) The Linguistic Cycle: Language Change and the Language Faculty. Oxford, UK: Oxford University Press.
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