( ( as ( speed increases ) ) ( ( the pressure ) ( decreases . ) ) )
(ROOT (S (PP (IN as) (NP (NN speed) (NNS increases))) (NP (DT the) (NN pressure)) (VP (VBZ decreases)) (. .)))
as speed increases the pressure decreases.
(ROOT (S (SBAR (WHADVP (WRB When)) (S (NP (NN gas) (NNS particles)) (VP (VB heat) (PRT (RP up))))) (, ,) (NP (NN pressure)) (VP (VBP increase)) (. .)))