In any linguistic research, it is necessary to separate
those meanings and functions of grammatical forms that existed in
some previous periods of the development, and those that are
productive and active at the moment that the researcher has chosen
as the starting point of analysis. In Turkish, there are language tools
that consist of two forms. From the historical point of view, each of
the forms has its own grammatical meaning and has the right to be
perceived as an independent unit. From the synchronic point of view,
at the modern stage of language, these forms are a single whole, each
form has its own meaning and cannot be analyzed separately from
the entire form. Such analytical forms include complex verbal and
adverbial constructions of modern Turkic languages.