*sntheri unattested未見語料√ theritheri + sn-instrumental focus工具焦點preterite過去式曾用來惹事的what was used to make troubleroot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———