I'm busy now.
( I ( ( ( 'm busy ) now ) . ) )
(ROOT (S (NP (PRP I)) (VP (VBP 'm) (ADJP (JJ busy)) (ADVP (RB now))) (. .)))
I won't be busy later if you still need help.
( I ( ( ( wo n't ) ( ( ( be busy ) later ) ( if ( you ( still ( need help ) ) ) ) ) ) . ) )
(ROOT (S (NP (PRP I)) (VP (MD wo) (RB n't) (VP (VB be) (ADJP (JJ busy)) (ADVP (RB later)) (SBAR (IN if) (S (NP (PRP you)) (ADVP (RB still)) (VP (MD need) (VP (VB help))))))) (. .)))