At the same moment I felt a terrific blow on the back of my head… ." She shuddered.
( ( ( ( ( ( At ( the ( same moment ) ) ) ( I ( ( felt ( a ( terrific blow ) ) ) ( on ( ( the back ) ( ( of ( my head ) ) ... ) ) ) ) ) ) . ) '' ) ( She shuddered ) ) . )
(ROOT (S (S (PP (IN At) (NP (DT the) (JJ same) (NN moment))) (NP (PRP I)) (VP (VBD felt) (NP (DT a) (JJ terrific) (NN blow)) (PP (IN on) (NP (NP (DT the) (NN back)) (PP (IN of) (NP (PRP$ my) (NN head)) (: ...)))))) (. .) ('' '') (S (NP (PRP She)) (VP (VBD shuddered))) (. .)))
I was hit on the back of my head.
( I ( ( was ( hit ( on ( ( the back ) ( of ( my head ) ) ) ) ) ) . ) )
(ROOT (S (NP (PRP I)) (VP (VBD was) (VP (VBN hit) (PP (IN on) (NP (NP (DT the) (NN back)) (PP (IN of) (NP (PRP$ my) (NN head))))))) (. .)))