seems to have forgotten everything he ever knew about generating suspense 
(ROOT (VP (VBZ seems) (S (VP (TO to) (VP (VB have) (VP (VBN forgotten) (NP (NP (NN everything)) (SBAR (S (NP (PRP he)) (ADVP (RB ever)) (VP (VBD knew) (PP (IN about) (S (VP (VBG generating) (NP (NN suspense)))))))))))))))
(ROOT (VP (VBZ ) (S (VP (TO ) (VP (VB ) (VP (VBN ) (NP (NP (NN )) (SBAR (S (NP (PRP )) (ADVP (RB )) (VP (VBD ) (PP (IN ) (S (VP (VBG ) (NP (NN )))))))))))))))