i don't understand that i thought that he was always a good player
( i ( ( do n't ) ( understand ( that ( i ( thought ( that ( he ( ( was always ) ( a ( good player ) ) ) ) ) ) ) ) ) ) )
(ROOT (S (NP (FW i)) (VP (VBP do) (RB n't) (VP (VB understand) (SBAR (IN that) (S (NP (FW i)) (VP (VBD thought) (SBAR (IN that) (S (NP (PRP he)) (VP (VBD was) (ADVP (RB always)) (NP (DT a) (JJ good) (NN player))))))))))))
I thought he was a better player than my brother. 
( I ( ( thought ( he ( was ( ( a ( better player ) ) ( than ( my brother ) ) ) ) ) ) . ) )
(ROOT (S (NP (PRP I)) (VP (VBD thought) (SBAR (S (NP (PRP he)) (VP (VBD was) (NP (NP (DT a) (JJR better) (NN player)) (PP (IN than) (NP (PRP$ my) (NN brother)))))))) (. .)))