( ( If ( you ( increase ( the volume ) ) ) ) ( , ( ( the temperature ) ( drops . ) ) ) )
(ROOT (S (SBAR (IN If) (S (NP (PRP you)) (VP (VB increase) (NP (DT the) (NN volume))))) (, ,) (NP (DT the) (NN temperature)) (VP (VBZ drops)) (. .)))
If you increase the volume, the temperature drops.
(ROOT (S (PP (IN As) (NP (NN temperature) (NNS increases))) (, ,) (NP (NN volume)) (VP (VBZ increases)) (. .)))