But the real dirty work had already been done.
( But ( ( the ( real ( dirty work ) ) ) ( ( ( had already ) ( been done ) ) . ) ) )
(ROOT (S (CC But) (NP (DT the) (JJ real) (JJ dirty) (NN work)) (VP (VBD had) (ADVP (RB already)) (VP (VBN been) (VP (VBN done)))) (. .)))
His girlfriend already did the dirty work.
( ( His girlfriend ) ( already ( ( did ( the ( dirty work ) ) ) . ) ) )
(ROOT (S (NP (PRP$ His) (NN girlfriend)) (ADVP (RB already)) (VP (VBD did) (NP (DT the) (JJ dirty) (NN work))) (. .)))