I was old enough at the time that I knew what was going on.
( I ( ( was ( ( ( old enough ) ( at ( the time ) ) ) ( that ( I ( knew ( what ( was ( going on ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (PRP I)) (VP (VBD was) (ADJP (ADJP (JJ old) (RB enough) (PP (IN at) (NP (DT the) (NN time)))) (SBAR (IN that) (S (NP (PRP I)) (VP (VBD knew) (SBAR (WHNP (WP what)) (S (VP (VBD was) (VP (VBG going) (PRT (RP on))))))))))) (. .)))
I was too young to understand what was going on.
( I ( ( was ( too ( young ( to ( understand ( what ( was ( going on ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (PRP I)) (VP (VBD was) (ADJP (RB too) (JJ young) (S (VP (TO to) (VP (VB understand) (SBAR (WHNP (WP what)) (S (VP (VBD was) (VP (VBG going) (PRT (RP on))))))))))) (. .)))