Maša do-obiž-a-l-a-s’ druz-ej (do togo , čto o-sta-la-s’ odn-a).
Masha DO-insult-IND-PST.SG-F-REFL friend-GEN.PL [to that.GEN that O-remain-PST.SG.F-REFL alone-SG.F
Masha kept insulting friends to the point that she had noone left.