A proportionately large number of you responded to that survey.
( ( ( A ( ( proportionately large ) number ) ) ( of you ) ) ( ( responded ( to ( that survey ) ) ) . ) )
(ROOT (S (NP (NP (DT A) (ADJP (RB proportionately) (JJ large)) (NN number)) (PP (IN of) (NP (PRP you)))) (VP (VBD responded) (PP (TO to) (NP (DT that) (NN survey)))) (. .)))
Not a one of you participated in the study.
( ( ( Not ( a one ) ) ( of you ) ) ( ( participated ( in ( the study ) ) ) . ) )
(ROOT (S (NP (NP (RB Not) (DT a) (NN one)) (PP (IN of) (NP (PRP you)))) (VP (VBD participated) (PP (IN in) (NP (DT the) (NN study)))) (. .)))