oh i've never itemized yet
( ( oh i ) ( ( 've never ) ( itemized yet ) ) )
(ROOT (S (NP (NNP oh) (NNP i)) (VP (VBP 've) (ADVP (RB never)) (VP (VBN itemized) (ADVP (RB yet))))))
I've never itemized before because it's too difficult.
( I ( ( ( 've never ) ( itemized ( before ( because ( it ( 's ( too difficult ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (PRP I)) (VP (VBP 've) (ADVP (RB never)) (VP (VBN itemized) (SBAR (RB before) (IN because) (S (NP (PRP it)) (VP (VBZ 's) (ADJP (RB too) (JJ difficult))))))) (. .)))