There are only two constructions that could be considered case.

The first involves subjects and topics. In the standard dialect, a redundant 3rd person pronoun ('tui') may optionally be used to mark the subject or topic to reduce ambiguity, while an alternative 3rd person pronoun ('keun') is now used exclusively (and optionally) to mark topics when a subject is also present.

Gmangpiangkeuu tui bui dua koh ler hwai. - emperor TPC reach PERF city GEN 1 - The emperor has arrived at our city.

Chooaywo piang keun io uang tui nlooayk. - rat be.big TPC man there TPC see - That man saw a big rat.

The second involves possession, namely the possessive marker 'ler', which, though classified as a verb, never occurs outside of genitive constructions.

koh ler hwai - city GEN 1 - our city

daich ler gedraap - uncle GEN chairperson - the chairperson's uncle