*mpstama unattested未見語料√ stamastama + mp-agent focus主事焦點future未來式distant遠將要駐足（遠期）will stop and stand (sometime later)root詞根√ stamaAF主事焦點LF處所焦點PF受事焦點IF工具焦點PRES現在式*smtama—stmaun*sstamaPRET過去式*smntama*sntmaan*sntama*snstamaFUT未來式*mpstamaDIST遠*mstamaIMMED近*sstmaan*sstmaun—IMP命令式stama—*stmai*stmani