( ( The temperature ) ( ( will ( ( go down ) ( as ( the ( volume increases ) ) ) ) ) . ) )
(ROOT (S (NP (DT The) (NN temperature)) (VP (MD will) (VP (VB go) (PRT (RP down)) (PP (IN as) (NP (DT the) (NN volume) (NNS increases))))) (. .)))
The temperature will go down as the volume increases.
(ROOT (S (PP (IN As) (NP (NN temperature) (NNS increases))) (, ,) (NP (NN volume)) (VP (VBZ increases)) (. .)))