The objective of this work is to define and establish the class of adverbs in Old Anatolian Turkish (OAT) as a solid grammatical category. In this work, adverbs and adverbials are taken in a wider scope, and the phrasal and syntactic adverbial constructions such as word groups, converbs and adverbial clauses are analyzed for that purpose. Adverbs are treated as a syntactic phenomenon and all analyses are carried out on syntactic contexts in examples of full sentences and sentence groups. In this work, the aim is to answer the following questions in OAT:
• to show what the functions and functional variations of adverbs are in the sentence,
• to show what the structures and the structural variations of adverbs are,
• to define what the meanings of the adverbs in OAT as a grammatical category are by examining the lexical, morphological and syntactic elements in the sentence.