( ( The keys ) ( ( will ( work ( ( as long ) ( as ( you ( ( have not ) ( reassigned ( them ( to ( perform ( different functions ) ) ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (DT The) (NNS keys)) (VP (MD will) (VP (VB work) (ADVP (ADVP (RB as) (RB long)) (SBAR (IN as) (S (NP (PRP you)) (VP (VBP have) (RB not) (VP (VBN reassigned) (S (NP (PRP them)) (VP (TO to) (VP (VB perform) (NP (JJ different) (NNS functions)))))))))))) (. .)))
The keys will work as long as you have not reassigned them to perform different functions.
(ROOT (S (NP (DT The) (JJ long) (NN bone)) (VP (VBP work) (PP (IN as) (NP (NN lever)))) (. .)))