(IP 
  (NP-PN-SBJ 
    (NR 民进党))
                    
  (VP 
    (VP 
      (LCP-TMP 
        (IP 
          (NP-SBJ 
            (-NONE- *PRO*))
                    
          (VP 
            (NP-TMP 
              (NT 过去))
                    
            (VP 
              (VV 在野))))
                    
        (LC 时))
                    
      (ADVP 
        (AD 也))
                    
      (ADVP 
        (AD 一再))
                    
      (VP 
        (VV 炮轰)))
                    
    (PU ，)
                    
    (VP 
      (IP-ADV 
        (NP-SBJ 
          (-NONE- *PRO*))
                    
        (VP 
          (ADVP 
            (AD 如今))
                    
          (VP 
            (VV 执政))))
                    
      (ADVP 
        (AD 自然))
                    
      (ADVP 
        (AD 很))
                    
      (VP 
        (VA 难)
                    
        (IP-OBJ 
          (NP-SBJ 
            (-NONE- *PRO*))
                    
          (VP 
            (ADVP 
              (AD 不))
                    
            (VP 
              (SB 被)
                    
              (VP 
                (VV 质疑)))))))))
arg0: 
                    *PRO* 
                
argm: 
                    过去