(IP 
  (NP-SBJ 
    (-NONE- *pro*))
                    
  (VP 
    (ADVP 
      (AD 真心))
                    
    (VP 
      (VV 觉得)
                    
      (IP-OBJ 
        (NP-SBJ 
          (NP 
            (PN 她们))
                    
          (CP 
            (WHNP-2 
              (-NONE- *OP*))
                    
            (CP 
              (IP 
                (NP-SBJ 
                  (-NONE- *T*-2))
                    
                (VP 
                  (ADVP 
                    (AD 那样))
                    
                  (VP 
                    (VA 软软甜甜))))
                    
              (DEC 的)))
                    
          (NP 
            (NN 语音)))
                    
        (VP 
          (ADVP 
            (AD 真是))
                    
          (VP 
            (VA 好听)))))))
arg0: 
                    *T*-2 
                
argm: 
                    那样