it , ▁ob l . pl . ▁m ó rt iti ▁ ▁Also , ▁the ▁iz of a ▁construction ▁is ▁used ▁in ▁Y ag hn obi ▁and ▁appears ▁in ▁phr ases ▁and ▁constru ctions ▁adopted ▁from ▁T aj ik ▁or ▁with ▁words ▁of ▁T aj ik ▁origin . ▁ ▁Pr on oun s ▁ ▁The ▁second ▁person ▁pl ural , ▁š um ó x ▁also ▁finds ▁use ▁as ▁the ▁pol ite ▁form ▁of ▁the ▁second ▁person . ▁ ▁N umer als ▁ ▁Verb ▁Personal ▁end ings ▁– ▁present : ▁ ▁Personal ▁end ings ▁– ▁pre ter ite ▁( with ▁augment ▁a - ): ▁ ▁By ▁adding ▁the ▁ending ▁- i št ▁(- št ▁after ▁a ▁v owel ; ▁but ▁- or + i št ▁> ▁- o št ) ▁to ▁the ▁pre ter ite , ▁the ▁dur ative ▁pre ter ite ▁is ▁formed . ▁ ▁The ▁present ▁partici ple ▁is ▁formed ▁by ▁adding ▁- na ▁to ▁the ▁ver bal ▁stem . ▁Past ▁partici ple ▁( or ▁perfect ▁partici ple ) ▁is ▁formed ▁by ▁addition ▁of ▁- ta ▁to ▁the ▁stem . ▁ ▁The ▁inf init ive ▁is ▁formed ▁by ▁addition ▁of ▁ending ▁- ak ▁to ▁the ▁ver bal ▁stem . ▁ ▁Neg ation ▁is ▁formed ▁by ▁prefix ▁na -, ▁in ▁combination ▁with ▁augment ▁in ▁pre ter ite ▁it ▁changes ▁to ▁n ē -. ▁ ▁The ▁cop ula ▁is ▁this : ▁ ▁Lex icon ▁ ▁Know ledge ▁of ▁Y ag hn obi ▁lex icon ▁comes ▁from ▁three ▁main ▁works : ▁from ▁a ▁Y ag