( ( Opaque objects ) ( ( ( do not ) ( allow ( light ( to ( pass ( through them ) ) ) ) ) ) . ) )
(ROOT (S (NP (JJ Opaque) (NNS objects)) (VP (VBP do) (RB not) (VP (VB allow) (ADJP (JJ light) (S (VP (TO to) (VP (VB pass) (PP (IN through) (NP (PRP them))))))))) (. .)))
Opaque objects do not allow light to pass through them.
(ROOT (S (NP (NNP Opaque)) (VP (VBZ is) (NP (NP (DT the) (NN term)) (PP (IN for) (NP (NN matter))) (SBAR (WHNP (WDT that)) (S (VP (VBZ does) (RB not) (VP (VB let) (NP (DT any) (JJ light) (NN pass)) (PRT (RP through)))))))) (. .)))