( ( When ( ( the moon ) ( passes ( into ( ( the ( earth 's ) ) shadow ) ) ) ) ) ( , ( it ( ( will ( be ( called ( the ( lunar eclipse ) ) ) ) ) . ) ) ) )
(ROOT (S (SBAR (WHADVP (WRB When)) (S (NP (DT the) (NN moon)) (VP (VBZ passes) (PP (IN into) (NP (NP (DT the) (NN earth) (POS 's)) (NN shadow)))))) (, ,) (NP (PRP it)) (VP (MD will) (VP (VB be) (VP (VBN called) (NP (DT the) (NN lunar) (NN eclipse))))) (. .)))
When the moon passes into the earth's shadow, it will be called the lunar eclipse.
(ROOT (S (SBAR (WHADVP (WRB When)) (S (NP (NP (NN earth) (POS 's)) (NN shadow)) (VP (VBZ falls) (PP (IN on) (NP (DT the) (NN moon)))))) (, ,) (NP (DT the) (NN shadow)) (VP (VBZ causes) (NP (DT a) (NN lunar) (NN eclipse))) (. .)))
When earth’s shadow falls on the moon, the shadow causes a lunar eclipse.