if the suspense never rises to a higher level , it is nevertheless maintained throughout 
(ROOT (S (SBAR (IN if) (S (NP (DT the) (NN suspense)) (ADVP (RB never)) (VP (VBZ rises) (PP (IN to) (NP (DT a) (JJR higher) (NN level)))))) (, ,) (NP (PRP it)) (VP (VBZ is) (ADVP (RB nevertheless)) (VP (VBN maintained) (PP (IN throughout))))))
(ROOT (S (SBAR (IN ) (S (NP (DT ) (NN )) (ADVP (RB )) (VP (VBZ ) (PP (IN ) (NP (DT ) (JJR ) (NN )))))) (, ) (NP (PRP )) (VP (VBZ ) (ADVP (RB )) (VP (VBN ) (PP (IN ))))))