The paper analyzes the functioning of the short past passive participles in the predicative position in West Russian Chronicles. The main focus is on the participles which are used without an auxiliary in the past tense and denote the past action. For an adequate analysis of these forms, it is necessary to use the material of both the Old Russian language and the Ukrainian, Belorussian and Polish languages. The analyzed forms can be used in the same two functions as in Old Russian: for denoting a resultative or an aoristic action. At the same time, -no-/-to- forms, which are almost grammaticalized and function as impersonal finite forms as in the Ukrainian and Polish languages, were found in the West Russian Chronicles. The emergence of these forms is caused, apparently, by the original ability of the past passive participles to be used without auxiliary in aoristic contexts. The discovery of these functions of the passive participles demonstrates the parallelism in the history of their development with two other participles: -ъš-/-vъš- and l-forms.
The article focuses on the reasons causing authors to write the non-expanded (single) participle ranenny with double N against the conventional recommended norm fixed in the dictionaries and reference books. There are pragmatic, semantic and syntactic factors under scrutiny -- all these influence the doubling of suffix N: there can be meanings of Result and Cause realized by a word in the specific lexical context; intensification of attribute during nomination; occurrence of participles and particles in the proximate context (within the limits of the sentence).