Reconstruction of the fragment of history of grammatical norm of the church Slavonic language (on the material of "Collection" by Nilus of Sora)

The article presents some results of the research that are aimed at identifying specific realization of grammatical norms of the Church Slavonic language (Russian edition of the XV - beginning of XVI century). In Hagiography 'Life of Saint Anuria of the Desert', which is included into "Sobornik of the Greek Saints' lives" by St. Nilus of Sora, functional-semantic specificity of the forms of the past tense is defined. It is established that in the Hagiography all possible preterit forms are used: aorist, imperfect, perfect, pluperfect. On the example of aorist and imperfect forms' usage it is proved that they implement not only the original semantics, but also the meanings, that are characteristic of other preteritum. Due to the context the aorist form can express the following aeristhesia meanings: specifically factual (when referring to a specifically singled undifferentiated actions attributable to the past and without any connection with reality), specifically processional (if the characteristic of a specific condition or process is associated with a specific moment in the past), and perfect (in case of designating condition at the moment of speech, which was the result of actions in the past), pluscuamperfecto (when referring to actions that preceded another past action) and imperfective (when referring to either long-term, continuous or repeated action in the past). The imperfect is used not only in its original meaning (long-term, repeated action or state), but also in the meanings of other preterito, in particular of the aorist. The mixture of past tense forms indicates a change in the nature of strict grammatical rules and the emergency of new grammatical rules of the Church Slavonic language (Russian edition).