If you have any questions, please feel free to stop by and see me.
( ( If ( you ( have ( any questions ) ) ) ) ( , ( please ( ( feel ( free ( to ( ( ( stop by ) and ) ( see me ) ) ) ) ) . ) ) ) )
(ROOT (S (SBAR (IN If) (S (NP (PRP you)) (VP (VBP have) (NP (DT any) (NNS questions))))) (, ,) (NP (NNP please)) (VP (VBP feel) (ADJP (JJ free) (S (VP (TO to) (VP (VP (VB stop) (PP (IN by))) (CC and) (VP (VB see) (NP (PRP me)))))))) (. .)))
Please come by to see me if you want to ask about anything. 
( Please ( ( ( come by ) ( to ( ( see me ) ( if ( you ( want ( to ( ask ( about anything ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (INTJ (UH Please)) (VP (VB come) (PRT (RP by)) (S (VP (TO to) (VP (VB see) (NP (PRP me)) (SBAR (IN if) (S (NP (PRP you)) (VP (VBP want) (S (VP (TO to) (VP (VB ask) (PP (IN about) (NP (NN anything))))))))))))) (. .)))