He had forgotten about Adrin.
( He ( ( had ( forgotten ( about Adrin ) ) ) . ) )
(ROOT (S (NP (PRP He)) (VP (VBD had) (VP (VBN forgotten) (PP (IN about) (NP (NNP Adrin))))) (. .)))
He remembered Adrin all this time.
( He ( ( ( remembered Adrin ) ( all ( this time ) ) ) . ) )
(ROOT (S (NP (PRP He)) (VP (VBD remembered) (NP (NNP Adrin)) (NP (PDT all) (DT this) (NN time))) (. .)))