is having fun with it all 
(ROOT (S (VP (VBZ is) (VP (VBG having) (NP (NN fun)) (PP (IN with) (NP (NP (PRP it)) (NP (DT all))))))))
(ROOT (S (VP (VBZ ) (VP (VBG ) (NP (NN )) (PP (IN ) (NP (NP (PRP )) (NP (DT ))))))))