( ( An ( electrical circuit ) ) ( ( is ( ( a network ) ( ( ( consisting ( of ( a ( closed loop ) ) ) ) , ) ( ( giving ( a ( return path ) ) ) ( for ( the current ) ) ) ) ) ) . ) )
(ROOT (S (NP (DT An) (JJ electrical) (NN circuit)) (VP (VBZ is) (NP (NP (DT a) (NN network)) (VP (VBG consisting) (PP (IN of) (NP (DT a) (JJ closed) (NN loop))) (, ,) (S (VP (VBG giving) (NP (DT a) (NN return) (NN path)) (PP (IN for) (NP (DT the) (JJ current)))))))) (. .)))
An electrical circuit is a network consisting of a closed loop, giving a return path for the current.
(ROOT (S (SBAR (IN Because) (S (NP (NNS charges)) (VP (MD must) (VP (VB have) (NP (DT an) (JJ unbroken) (NN path) (S (VP (TO to) (VP (VB follow))))))))) (, ,) (NP (JJ electric) (NN current)) (VP (MD can) (RB not) (VP (VB flow) (PP (IN through) (NP (DT a) (NN material))) (SBAR (IN unless) (S (NP (PRP it)) (VP (VBZ forms) (NP (DT a) (VBN closed) (NN loop))))))) (. .)))