Datapoint Hoava/Can mood be marked by an inflecting word ("auxiliary verb")?

Language or dialect:
Hoava
Feature:
Can mood be marked by an inflecting word ("auxiliary verb")?
Coding:
present (Davis 2003: 151-152)
Comment:
“The optative marker is a preverbal marker which takes the nominal indexing suffixes to index the subject of a verb. A full set of subject forms has been retained in the language, although the forms are regarded by Hoava speakers as little used.” (Davis 2003:151) The discussion in the cited pages shows that this marking is still productive, despite being rare.