is as adult as you can get 
(ROOT (S (VP (VBZ is) (ADJP (ADJP (RB as) (NN adult)) (SBAR (IN as) (S (NP (PRP you)) (VP (MD can) (VP (VB get)))))))))
(ROOT (S (VP (VBZ ) (ADJP (ADJP (RB ) (NN )) (SBAR (IN ) (S (NP (PRP )) (VP (MD ) (VP (VB )))))))))