%%% outline
%-------------------------------------------------------------------------

\vspace{0.3em}
\begin{tikzpicture}


\begin{scope}[scale=1.0,level distance=30pt,sibling distance=15pt,grow'=up]
{
\Tree[.\node(sn0){IP};
          [.\node(sn1){NP};
               [.\node(sn2){NN}; \node(sw1){猫}; ]
          ]
          [.\node(sn3){VP};
               [.\node(sn4){VV}; \node(sw2){喜欢}; ]
               [.\node(sn5){VP}; \edge[roof]; \node(sw3){吃 \ 鱼}; ]
          ]
     ]
}
\end{scope}

\end{tikzpicture}

%---------------------------------------------------------------------