( It ( ( can ( be ( very ( consuming ( of ( ( time and ) energy ) ) ) ) ) ) . ) )
(ROOT (S (NP (PRP It)) (VP (MD can) (VP (VB be) (ADJP (RB very) (JJ consuming) (PP (IN of) (NP (NN time) (CC and) (NN energy)))))) (. .)))
It can be very consuming of time and energy.
(ROOT (S (NP (NP (JJ Electrical) (NN energy)) (VP (VBN consumed))) (VP (MD can) (VP (VB be) (VP (VBN expressed) (PP (IN as) (NP (NP (DT the) (NN product)) (PP (IN of) (NP (NP (NN power)) (VP (VBN multiplied) (PP (IN by) (NP (NN time))))))))))) (. .)))