Push them back.
( ( ( Push them ) back ) . )
(ROOT (S (VP (VBP Push) (NP (PRP them)) (ADVP (RB back))) (. .)))
They need to be shoved back now.
( They ( ( need ( to ( be ( ( shoved back ) now ) ) ) ) . ) )
(ROOT (S (NP (PRP They)) (VP (VBP need) (S (VP (TO to) (VP (VB be) (VP (VBN shoved) (PRT (RP back)) (ADVP (RB now))))))) (. .)))