Update AUX_.md
Update AUX_.md

Copulas are AUX, not main verbs.
UniversalDependencies/docs,UniversalDependencies/docs,PhyloStar/UDTelugu,PhyloStar/UDTelugu,PhyloStar/UDTelugu,PhyloStar/UDTelugu,PhyloStar/UDTelugu,UniversalDependencies/docs,UniversalDependencies/docs,PhyloStar/UDTelugu,UniversalDependencies/docs,UniversalDependencies/docs