I have a situation.
( I ( ( have ( a situation ) ) . ) )
(ROOT (S (NP (PRP I)) (VP (VBP have) (NP (DT a) (NN situation))) (. .)))
I am dealing with certain circumstances.
( I ( ( am ( dealing ( with ( certain circumstances ) ) ) ) . ) )
(ROOT (S (NP (PRP I)) (VP (VBP am) (VP (VBG dealing) (PP (IN with) (NP (JJ certain) (NNS circumstances))))) (. .)))