"Half-lying" is OK for me but "half-lied" doesn't exist. "Lied" doesn't work in the same way that "seated" does.
Originally Posted by milan2003_07
He was seated on the chair = He was sitting on the chair
He was lied on the bed is incorrect and should be "He was lying on the bed".
You can describe someone as "half-seated and half-lying" on something but "half-sitting and half-lying" sounds better.
Remember - correct capitalisation, punctuation and spacing make posts much easier to read.