(IP (ADVP (AD 然而))
(NP-SBJ (PN 他))
(VP (VP (ADVP (AD 只是))
(VP (VV 敷上)
(NP-OBJ (QP (CD 一)
(CLP (M 层)))
(NP (NN 灰泥)))))
(PU ，)
(VP (VV 咬咬)
(NP-OBJ (NN 牙)))
(PU ，)
(VP (ADVP (AD 又))
(VP (VV 继续)
(VP (VV 干活))))))
ARG0: 他
ARG1: 牙
ARGM-DIS: 然而
REL: 咬咬