*snsberih unattested未見語料√ sberihsberih + sn-instrumental focus工具焦點preterite過去式曾用來解開的what was used to undoroot詞根√ sberihAF主事焦點LF處所焦點PF受事焦點IF工具焦點PRES現在式smberihmsberih——*ssberihPRET過去式*smnberih—*snberih*snsberihFUT未來式*mpsberihDIST遠———