I shan't stop you."
( I ( ( ( ( sha n't ) ( stop you ) ) . ) '' ) )
(ROOT (S (NP (PRP I)) (VP (VBP sha) (RB n't) (VP (VB stop) (NP (PRP you)))) (. .) ('' '')))
You can stop.
( You ( ( can stop ) . ) )
(ROOT (S (NP (PRP You)) (VP (MD can) (VP (VB stop))) (. .)))