You did a really good job.
( You ( ( did ( a ( ( really good ) job ) ) ) . ) )
(ROOT (S (NP (PRP You)) (VP (VBD did) (NP (DT a) (ADJP (RB really) (JJ good)) (NN job))) (. .)))
You did better at your assignment than anyone else.
( You ( ( ( ( did better ) ( at ( your assignment ) ) ) ( than ( anyone else ) ) ) . ) )
(ROOT (S (NP (PRP You)) (VP (VBD did) (NP (JJR better)) (PP (IN at) (NP (PRP$ your) (NN assignment))) (PP (IN than) (NP (NN anyone) (RB else)))) (. .)))