( This ( ( will ( increase ( the volume ) ) ) . ) )
(ROOT (S (NP (DT This)) (VP (MD will) (VP (VB increase) (NP (DT the) (NN volume)))) (. .)))
This will increase the volume.
(ROOT (S (PP (IN As) (NP (NN temperature) (NNS increases))) (, ,) (NP (NN volume)) (VP (VBZ increases)) (. .)))