(IP 
  (NP-SBJ 
    (PN 这))
                    
  (VP 
    (VP 
      (ADVP 
        (AD 还))
                    
      (VP-PRD 
        (VC 是)
                    
        (NP-PRD 
          (CP 
            (WHNP-1 
              (-NONE- *OP*))
                    
            (CP 
              (IP 
                (NP-SBJ 
                  (-NONE- *T*-1))
                    
                (VP 
                  (VV 银货两讫)))
                    
              (DEC 的)))
                    
          (NP 
            (NN 买卖)))))
                    
    (PU ，)
                    
    (VP 
      (ADVP 
        (AD 较))
                    
      (VP 
        (VA 简单)
                    
        (IP-OBJ 
          (NP-SBJ 
            (-NONE- *PRO*))
                    
          (VP 
            (VV 应付)))))))
arg0: 
                    *T*-1