*thiyi unattested未見語料√ theithei + -ipatient focus受事焦點imperative命令式把它聽話！obedient it!root詞根√ theiAF主事焦點LF處所焦點PF受事焦點IF工具焦點PRES現在式*tmhei*thiyanthiyun*stheiPRET過去式*tmnheitnhiyan*tnhei*sntheiFUT未來式*mptheiDIST遠*mtheiIMMED近*tthiyan*tthiyun—IMP命令式thei—*thiyi—