*snruwa unattested未見語料√ sruwasruwa + ⟨n⟩patient focus受事焦點preterite過去式答應過的；已把…答應what was agreed; agreed itroot詞根√ sruwaAF主事焦點LF處所焦點PF受事焦點IF工具焦點PRES現在式———*ssruwaPRET過去式*smnruwa—*snruwa*snsruwaFUT未來式*mpsruwaDIST遠*msruwaIMMED近———IMP命令式sruwa—srwai—