In Burushaski, possessors of direct objects and (some) intransitive subjects, i.e. absolutive arguments, can control the agreement prefix on the predicate which otherwise cross-references the host of the possessor. The possibility of agreement is restricted by grammatical function (or case), and according to Willson (1996) by lexical items as well. Agreement can be in person, number, and gender.
In addition, a part-whole relation between the subject of a syntactically subordinate non-finite clause and the superordinate subject can license the use of a same-subject (SS) converb that is otherwise restricted to contexts in which the two subjects are coreferential.
Anderson, Gregory D. S. and Randall Eggert. 2001. A typology of verb agreement in Burushaski, Linguistics of the Tibeto-Burman Area 24(2): 235-254.
Tikkanen, Bertil. 1995. Burushaski converbs in their areal context, in Martin Haspelmath & Ekkehart König (eds), Converbs in cross-linguistic perspective, 487-528. Berlin: De Gruyter.
Willson, Stephen R. 1996. Verb agreement and case marking in Burushaski, Working Papers of the Summer Institute of Linguistics 40: 1-71.