Verbal derivational affix from Old Turkish into Today's Turkish

The verbal derivational affixes of Turkish constitute the main subject of the research. These affixes are analyzed by giving examples from the texts scanned for each period from Old Turkish to Today's Turkish. Since it is a study based on written texts, verbal derivational affixes used in dialects are excluded from the study. All affixes were collected from grammars of the historical periods of Turkish, Turkish grammar books, theses, articles and papers and given in alphabetical order. Every affix that can be exemplified by texts was included in the study, regardless of whether the affix is very popular, limited in its popularity, or has only one example. The study comprises three chapters. In the first chapter, the concepts of root, stem, affix, word and verb; in the second chapter, affixes deriving verbs from nouns; in the third chapter, affixe deriving verbs from verbs are given. After the information about affixes is given, information about the origin, functions, development, change and formation of affixes is presented and the examples identified for each affix from the scanned works belonging to the historical written language periods are listed one below the other. This method was preferred in order to concretize the information given about affixes and to provide evidence for the existence and usage of affixes. In this context, it will be specified in which period of Turkish a affix was present, in which period it disappeared, in which period it was active, in which period its activity decreased, or in which written language period an affix started to be used again. The essence of the study is to reveal the change, development and formation of affixes or their combination with another affix. Moreover, at the end of the study, a table with all the affixes has been added. This table will provide a general view of the status and usage of affixes in historical periods.