( ( ( The reason ) ( that ( water ( forms ( a liquid ) ) ) ) ) ( ( is ( that ( oxygen ( is ( more ( electronegative ( than ( all ( of ( ( these elements ) ( with ( ( the exception ) ( of fluorine ) ) ) ) ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NP (DT The) (NN reason)) (SBAR (IN that) (S (NP (NN water)) (VP (VBZ forms) (NP (DT a) (NN liquid)))))) (VP (VBZ is) (SBAR (IN that) (S (NP (NN oxygen)) (VP (VBZ is) (ADJP (RBR more) (JJ electronegative) (PP (IN than) (NP (NP (DT all)) (PP (IN of) (NP (NP (DT these) (NNS elements)) (PP (IN with) (NP (NP (DT the) (NN exception)) (PP (IN of) (NP (NN fluorine)))))))))))))) (. .)))
The reason that water forms a liquid is that oxygen is more electronegative than all of these elements with the exception of fluorine.
(ROOT (S (NP (NNP Oxygen)) (VP (VBZ is) (NP (NP (DT the) (NN name)) (PP (IN of) (NP (DT the) (JJ second) (ADJP (RBS most) (JJ electronegative)) (NN element))))) (. .)))