just ca n't take it any more 
(ROOT (S (ADVP (RB just)) (VP (MD ca) (RB n't) (VP (VB take) (NP (PRP it)) (ADVP (DT any) (JJR more))))))
(ROOT (S (ADVP (RB )) (VP (MD ) (RB ) (VP (VB ) (NP (PRP )) (ADVP (DT ) (JJR ))))))