Monograph by A. B. Flying, Professor of the School of Linguistics of the National Research University Higher School of Economics and an employee of the Institute of the Russian Language of the Russian Academy of Sciences, is devoted to Russian constructions with sentential actants (subordinate clauses that take the place of the actant of the main verb). The author clarifies existing descriptions of types of subordinate constructions with what (I know he came), infinitive (I forgot to close the door), etc.