do n't need to try very hard 
(ROOT (S (VP (VBP do) (RB n't) (VP (VB need) (S (VP (TO to) (VP (VB try) (ADVP (RB very) (RB hard)))))))))
(ROOT (S (VP (VBP ) (RB ) (VP (VB ) (S (VP (TO ) (VP (VB ) (ADVP (RB ) (RB )))))))))