купна•ш (-ем)
{verb II} [Generate paradigm] 1. to be covered by algae, to be covered with pond scum
♢ ши•нчыше вӱд купна• {sentence} standing water gets covered with algae
~ ASPECTUAL CONVERB CONSTRUCTIONS ~
// купне•н шинча•ш (-ем) {verb II} {imperfective} (see above)
♢ вӱд купне•н шинча• {sentence} the water is being covered by algae
--"PARENT"--> купа•ш (-ем)