*pnsrobo unattested未見語料√ psrobopsrobo + ⟨n⟩patient focus受事焦點preterite過去式結網過的；已把…結網what was knotted a net; knotted a net itroot詞根√ psroboAF主事焦點LF處所焦點PF受事焦點IF工具焦點PRES現在式*pmsrobo——smroboPRET過去式*pmnsrobo—*pnsrobo*snpsroboFUT未來式*mppsroboDIST遠*mpsroboIMMED近———IMP命令式psrobo———