( (IP (NP-TMP (NT 当时))
(PU ，)
(DP-TMP (CP (WHPP-1 (-NONE- *OP*))
(CP (IP (NP-SBJ (-NONE- *pro*))
(VP (PP-TMP (-NONE- *T*-1))
(VP (VV 听课))))
(DEC 的)))
(DP (DT 那)
(QP (CD 一)
(CLP (M 天)))))
(NP-SBJ (-NONE- *pro*))
(VP (ADVP (AD 可))
(ADVP (AD 不))
(VP (VC 是)
(NP-PRD (ADJP (JJ 那么))
(QP (CLP (M 回)))
(NP (NN 事)))))
(PU ，)))
ARG0: *pro*
ARGM-TMP: *T*-1
REL: 听课