AuxVInfl: Auxiliary verbs are verbs, and the inflection of lexical and auxiliary verbs is the same.
AuxNotVInfl: Auxiliaries are verbs, but the inflection of auxiliaries is not identical to that of lexical verbs.
(1) əj ʌāt-nə īttən-ɣə jəɣ, pətəɣʌə-taɣə jə-ɣ
a time-loc evening-tra become-pst.3sg dark-inf begin-pst.3sg
‘All of a sudden it became night, it was getting dark.’ (Csepregi 1998: 74.)
(2) qoʌtɔ̄ɣiʌ pon wär-taɣə pīt-ʌ-əm
tomorrow fish_basket make-inf begin-prs-1sg
‘I’m going to make a fish-basket tomorrow.’ (Pesikova 2003a: 57.)
(3) īttən wēra-ɣa jaqə-n waʌ-taɣə mɔ̄s-ʌ
evening Vera-lat home-loc be-inf must/have_to-prs.3sg
‘In the evening, Vera has to/must be at home.’ (L. N. K.)
(4) īttən mān-tem jaqə-n waʌ-taɣə mɔ̄s-ʌ
evening I-dat home-loc be-inf must/have_to-prs.3sg
‘I have to/must be at home in the evening.’ (L. N. K.)
In Surgut Khanty, the verb jә ‘become something’ is often used as auxiliary next to infinitives of main verbs in order to express inchoative aktionsart (1). Similarly, the verb pīt ‘fall, come to’ is considered to be a future auxiliary in recent grammars (2). The verb mɔ̄s ‘must/have to’ expresses necessity and it has only third person forms (3), (4).