Let $\mathscr F$ and $\mathscr G$ be sheaves. $\mathscr{H}\hspace{-3pt}om$ does not commute with taking stalks. More precisely: It is not true in general that $\mathscr{H}\hspace{-3pt}om(\mathscr F, \mathscr G)_p$ is isomorphic to $\mathscr{H}\hspace{-3pt}om(\mathscr F_p,\mathscr G_p)$.

How to verify the above fact?