A system which relates entities to a reference point is termed a deictic system, and we can therefore say that tense is deictic.15 (By contrast, aspect is non-deictic, since discussion of the internal temporal constituency of a situation is quite independent of its relation to any other time point.)
Gerd Jendraschek, A fresh look at the tense-aspect system of Turkish ; University of Regensburg, Language Research 47.2: 245-270 [3]
Aslı Göksel and Celia Kerslake, Turkish Grammar, Routledge, 2005 p.300,21.4.2.1 The expression of possibility ; p.305,21.4.2.2 The expression of necessity/obligation[10]
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J.Durn-Tragut, Armenian, London Oriental and African Library, p.241 et suivantes, ch.2, subordinate clauses[8]
Ces morphèmes sont considérés généralement comme des auxiliaires verbaux ou adjectivaux par les grammaires japonaises ( du fait de leur origine verbale ou adjectivale ) et comme des suffixes par les grammaires occidentales[11]
