PurpVBal: The verb of a purpose construction obligatorily appears in base form.
PurpVDrk: The verb of a purpose construction always appears in a single special form, regardless of both the features of the verb and whether the subject of the purpose construction is coreferential with that of the main clause.
(1) miša ūs-n mina-s, kaŋk-e jot χontχat-ne maγǝs.
(2) miša ūs-n min-as, tot at xūrit-ane-te maγǝs.
(3) miša ūs-n ta urǝl mina-s, tot kaŋk-e jot χontχati.
In Northern Mansi, purpose constructions are typically expressed by participles (1), (2). However, there is another construction, which contains a relative pronoun and two finite verb forms (3) (Rombandeeva 1979). The use of these grammatical structures is not restricted by the difference between the subjects of the two predicates, or the properties of the verb.