They make a pretty pair working together.
( They ( ( make ( ( a ( pretty pair ) ) ( working together ) ) ) . ) )
(ROOT (S (NP (PRP They)) (VP (VBP make) (NP (NP (DT a) (JJ pretty) (NN pair)) (VP (VBG working) (ADVP (RB together))))) (. .)))
They had worked together already.
( They ( ( had ( ( worked together ) already ) ) . ) )
(ROOT (S (NP (PRP They)) (VP (VBD had) (VP (VBN worked) (PRT (RP together)) (ADVP (RB already)))) (. .)))