In languages that make an extensive use of conjunctions converbs play a minor role or are completely absent. Conversely, in languages that make extensive use of converbs, the role of conjunctions is less important.
Standardized
IF there is an extensive use of conjunctions, THEN converbs play a minor role or are completely absent. IF there is an extensive use of converbs, THEN the role of conjunctions is less important.
However, constructions with converbs and conjunctions are by no means always interchangeable in languages that have both (Nedjalkov 1995: 100).