, ▁T î r î ▁pron oun s ▁change ▁form ▁depending ▁on ▁whether ▁they ▁are ▁being ▁used ▁as ▁subject ive , ▁objective ▁or ▁free ▁forms , ▁the ▁latter ▁en comp ass ing ▁a ▁variety ▁of ▁other ▁pron oun ▁us ages , ▁such ▁as ▁pron oun s ▁that ▁have ▁been ▁top ical ized ▁and ▁occur ▁sentence - initial ly , ▁as ▁seen ▁below ▁( O sum i , ▁ 1 9 9 5 , ▁pp .   3 9 – 4 0 ). ▁ ▁{ | ▁| ▁( 3 ) ▁|| nr ô || u || ta || nr î || u || ta || ô - nr î ▁| - ▁| ▁|| 1 SG || 1 SG || hit || 3 SG || 1 SG || hit || head - 3 SG ▁| - ▁| ▁|| col span = 6 | ▁' Me , ▁I ▁hit ▁him ; ▁I ▁hit ▁his ▁head .' ▁( O sum i , ▁ 1 9 9 5 , ▁p .   4 0 ) ▁| } ▁ ▁While ▁they ▁are ▁class ified ▁as ▁pron oun s ▁as ▁they ▁fill ▁the ▁subject ▁pron oun ▁slot , ▁T î r î ' s ▁two ▁imp erson al ▁pron oun s ▁show ▁less ▁flex ibility ▁than ▁personal ▁pron oun s . ▁They ▁do ▁not ▁show ▁any ▁distinction ▁for ▁person ▁or ▁number ▁and ▁occur ▁only ▁in ▁their ▁respective ▁forms ▁of ▁h ê rr ê ▁and ▁va , ▁are ▁unable ▁to ▁appear ▁anywhere ▁other ▁than ▁the ▁subject ▁pron oun ▁position ▁( the