The article discusses the problem of participial norms and the semantic interaction of the Russian adverbial participle with the category of subject. A classification of incorrect, abnormal constructions is proposed. The paper presents arguments that abnormal examples arise when a modus component of the sentence is activated, i.e. an adverbial participle саn be related to the modus subject or the dictum subject. The anomalous syntactic construction can be comprehensible, that means grammatically correct, if the subject uniting the matrix and the subordinate clause refers to the subject of thought, speech and perception. The construction is considered normative if the adverbial participle has been transposed to a parenthesis. A position is recognized as a parenthetical one when the participle refers to the implicit modus. The authors also present a link between adverbial participles and the egocentric syntactic technique of the language. The article shows that the adverbial participle construction with the modus subject regularly appears in the texts of certain genre conditions. Fiction involves the egocentric technique with various semantic effects: participles detect the author's internal point of view (both third person and first) and become a means of the personification of an inanimate subject (poetic texts).