( ( If ( ( ( Boyles ' ) law ) ( ( does n't ) ( make ( ( any sense ) ( in chemistry ) ) ) ) ) ) ( , ( then ( ( ( ( ( blow up ) ( a balloon ) ) and ) ( ( show him ) ( how ( ( lowering ( the ( total volume ) ) ) ( increases ( the pressure ) ) ) ) ) ) . ) ) ) )
(ROOT (S (SBAR (IN If) (S (NP (NP (NNP Boyles) (POS ')) (NN law)) (VP (VBZ does) (RB n't) (VP (VB make) (NP (NP (DT any) (NN sense)) (PP (IN in) (NP (NN chemistry)))))))) (, ,) (ADVP (RB then)) (VP (VP (VB blow) (PRT (RP up)) (NP (DT a) (NN balloon))) (CC and) (VP (VB show) (NP (PRP him)) (SBAR (WHADVP (WRB how)) (S (S (VP (VBG lowering) (NP (DT the) (JJ total) (NN volume)))) (VP (VBZ increases) (NP (DT the) (NN pressure))))))) (. .)))
If Boyles' law doesn't make any sense in chemistry, then blow up a balloon and show him how lowering the total volume increases the pressure.
(ROOT (S (SBAR (WHADVP (WRB When)) (S (NP (PRP you)) (VP (VBP add) (NP (NP (NNS moles)) (PP (IN of) (NP (NP (NN gas)) (PP (TO to) (NP (DT a) (NN baloon)))))) (PP (IN by) (S (VP (VBG blowing) (NP (PRP it)) (PRT (RP up)))))))) (, ,) (NP (DT the) (NN volume)) (VP (VBZ increases)) (. .)))