/thas / थस्

/thas "you'' (flat)" is the dual ending in group /sipthastha.

**paca पच + /thas → !**pacathas पचथस् "you two cook"

**naya- नयॱ + /thas → !**nayathas नयथस् "you two lead"

/thas becomes /tam''' in the Git tenses, by tasthasthamip... —

pac पच् + /zap + /laG /thas
→ **apaca- अपचॱ + /thas
→ **apaca- अपचॱ + /tam'''
→ !**apacatam अपचतम् "you two cooked"