*mptheri unattested未見語料√ theritheri + mp-agent focus主事焦點future未來式distant遠將要惹事（遠期）will make trouble (sometime later)root詞根√ theriAF主事焦點LF處所焦點PF受事焦點IF工具焦點PRES現在式tmheri——*stheriPRET過去式*tmnheri—*tnheri*sntheriFUT未來式*mptheriDIST遠*mtheriIMMED近———IMP命令式——thrii—derived stems衍生詞幹AF主事焦點LF處所焦點PF受事焦點IF工具焦點REC相互mttheri———