ante ▁also ▁contains ▁a ▁nomin ative - acc us ative ▁sub system , ▁found ▁when ▁( O ) ▁is ▁non - sing ular ▁and ▁in defin ite , ▁when ▁( O ) ▁is ▁ 1 st ▁person ▁dual , ▁or ▁( O ) ▁is ▁ 2 nd ▁person ▁dual ▁and ▁( A ) ▁ 1 st ▁person ▁pl ural ▁simultaneously . ▁A ▁nomin ative - acc us ative ▁system ▁is ▁marked ▁when ▁( S ) ▁and ▁( A ) ▁are ▁treated ▁equally , ▁while ▁( O ) ▁diff ers , ▁with ▁the ▁first ▁two ▁obtain ing ▁nomin ative ▁mark ing ▁and ▁the ▁third ▁getting ▁accus ative . ▁In ▁X av ante , ▁the ▁nomin ative - acc us ative ▁sub system ▁most ▁commonly ▁marks ▁( O ) ▁for ▁number ▁while ▁the ▁other ▁two ▁do ▁not ▁get ▁mark ing , ▁although ▁the ▁reverse ▁is ▁also ▁true . ▁This ▁is ▁seen ▁in ▁the ▁following ▁example : ▁ ▁" They ▁are ▁both ▁c ough ing ." ▁ ▁" It ▁was ▁made ▁by ▁both ▁of ▁them , ▁the ▁basket ." ▁ ▁X av ante ▁also ▁uses ▁a ▁person - mark ing ▁system , ▁in ▁which ▁subjects ▁and ▁objects ▁are ▁marked ▁differently ▁depending ▁on ▁a ▁number ▁of ▁criteria . ▁The ▁absol utive ▁series ▁marks ▁both ▁in trans itive ▁subjects ▁and ▁trans itive ▁objects ; ▁the ▁accus ative ▁series ▁marks ▁ 1 st ▁person ▁dual , ▁pl ural ▁object , ▁ 3 rd ▁person ▁singular , ▁or ▁dual ▁or ▁pl ural ▁object ▁when ▁the ▁subject ▁is ▁ 2 nd