This study examines the correlation between form and meaning of Russian prefixed imperfective verbs ending in -át'/-ját' and -yvat'/-ivat' which are derived from one and the same root (-gotóvit', podgotovlját'/podgotávlivat'). The following questions are discussed: Which factors determine the use of either the form -át' or the form in -yvat'? What is the role of the opposition determinate/indeterminate in verbs which do not express linear motion? What is the relation between prefix and suffix? (-xvalit', vosxvalját', vyxvalját'/vyxválivat', naxválivat').Is there a tendency for forms in -át' to be replaced by forms in -yvat' (prisposoblját' by prisposáblivat') or vice versa (obsú^zivat' by obsu^zdát')?
Besides present-day Russian, literary, journalistic and scientific publications from the 19th century have been examined in order to establish the dynamics of the linguistic development.
Chapter 1: Formation of prefixed imperfective verbs. Chapter 2: Outline of specialist literature. Chapter 3: Consultation of native speakers. Chapter 4: An analysis based on over 750 examples of the derived forms of krásit', belít', su^sít', gotóvit', and rézat'. There is an index containing about 500 verb roots, from -bávit' to -jasnít'sja. With each root a number of derived prefixed imperfective verbs in -át' and/or -yvat' are given, as presented in V.I. Dal's dictionary (mid-19th century), the 17-volume Academy Dictionary (1950-1965), and A.A. Zaliznjak's grammatical dictionary (1977). Zaliznjak offers only the forms that meet the current literary norm. For a number of verbs the index contains explanatory notes and examples.