ive ▁voice . ▁When ▁using ▁past ▁t ense , ▁speak ers ▁must ▁indicate ▁if ▁this ▁knowledge ▁of ▁the ▁past ▁is ▁based ▁in ▁he ars ay ▁or ▁personal ▁knowledge . ▁W ich ita ▁speak ers ▁also ▁use ▁a ▁morph eme ▁which ▁amounts ▁to ▁two ▁versions ▁of ▁" we "; ▁one ▁that ▁includes ▁the ▁listener , ▁and ▁one ▁that ▁does ▁not . ▁W ich ita ▁also ▁differenti ates ▁between ▁singular , ▁dual ▁and ▁pl ural ▁number , ▁instead ▁of ▁the ▁simpler ▁singular ▁or ▁pl ural ▁design ations ▁commonly ▁found . ▁ ▁Aff ix es ▁Some ▁W ich ita ▁aff ix es ▁are : ▁ ▁imper fect ive . f uture . quot ative ▁' I ▁heard ▁she ' ll ▁be ▁cook ing ▁it .' ▁ ▁Inst rument al ▁suffix es ▁ ▁The ▁suffix ▁is ▁R á : h ir , ▁added ▁to ▁the ▁base . ▁Another ▁means ▁of ▁express ing ▁instrument , ▁used ▁only ▁for ▁body ▁parts , ▁is ▁a ▁characteristic ▁position ▁of ▁incorpor ation ▁in ▁the ▁verb ▁complex . ▁ ▁ha : r hi wi : c á : h ir ▁▁▁▁ ▁' using ▁a ▁bow l ' ▁( ha : r hi wi : c ▁' bow l ') ▁ ▁i ka : rá : h ir ▁▁▁▁▁▁▁▁▁ ▁' with ▁a ▁rock ' ▁( ika : <0xC9> <0x81> a ▁' rock ') ▁ ▁ki rik ir <0xC9> <0x81> i : s á : h ir ▁▁▁ ▁' in ▁W ich ita ▁( the ▁language )' ▁( ki rik ir <0xC9> <0x81> i :