( Likewise ( , ( ( ( ( ( ( when ( ( an ( ionic compound ) ) melts ) ) ( , ( ( the ions ) ( are ( able ( to ( move freely ) ) ) ) ) ) ) , ) and ) ( ( the liquid ) ( conducts current ) ) ) . ) ) )
(ROOT (S (ADVP (RB Likewise)) (, ,) (S (SBAR (WHADVP (WRB when)) (S (NP (DT an) (JJ ionic) (NN compound)) (VP (VBZ melts)))) (, ,) (NP (DT the) (NNS ions)) (VP (VBP are) (ADJP (JJ able) (S (VP (TO to) (VP (VB move) (ADVP (RB freely)))))))) (, ,) (CC and) (S (NP (DT the) (NN liquid)) (VP (VBZ conducts) (ADJP (JJ current)))) (. .)))
Likewise, when an ionic compound melts, the ions are able to move freely, and the liquid conducts current.
(ROOT (S (NP (NNP Ionic)) (VP (VBZ compounds) (NP (NP (JJS best) (NN conduct) (NN electricity)) (PP (IN in) (NP (DT a) (JJ liquid) (NN state))))) (. .)))