*mptlibu unattested未見語料√ tlibutlibu + mp-agent focus主事焦點future未來式distant遠將要圍著某物(遠期)will surround something (sometime later)root詞根√ tlibuAF主事焦點LF處所焦點PF受事焦點IF工具焦點PRES現在式mtlibu——*stlibuPRET過去式*tmnlibu—*tnlibu*sntlibuFUT未來式*mptlibuDIST遠———