It's just not me.
( It ( ( ( 's ( just not ) ) me ) . ) )
(ROOT (S (NP (PRP It)) (VP (VBZ 's) (ADVP (RB just) (RB not)) (NP (PRP me))) (. .)))
I'm all alone on this.
( I ( ( ( ( 'm all ) alone ) ( on this ) ) . ) )
(ROOT (S (NP (PRP I)) (VP (VBP 'm) (RB all) (ADJP (RB alone)) (PP (IN on) (NP (DT this)))) (. .)))