(NP-SBJ 
  (PN 他))
                    
(VP 
  (VP 
    (ADVP 
      (AD 因此))
                    
    (PP-MNR 
      (P 借着)
                    
      (NP 
        (DNP 
          (NP 
            (PN 自己))
                    
          (DEG 的))
                    
        (NP 
          (NN 水电)
                    
          (NN 专长))))
                    
    (PU ，)
                    
    (ADVP 
      (AD 先))
                    
    (VP 
      (BA 将)
                    
      (IP-OBJ 
        (NP-SBJ-2 
          (NN 电梯)
                    
          (NN 上下楼)
                    
          (NN 按钮)
                    
          (NN 箭头))
                    
        (VP 
          (VV 对调)
                    
          (NP-OBJ 
            (-NONE- *-2))))))
arg0: 
                    他          
                
argm: 
                    因此          
                
argm: 
                    借着 自己 的 水电 专长          
                
argm: 
                    先          
                
arg1: 
                    电梯 上下楼 按钮 箭头 -> *-2