( ( As ( ( more and ) more ) ) ( ( water vapor ) ( ( cools ( into ( ( ( the clouds ) , ) ( ( the ( water droplets ) ) ( that ( form ( ( the clouds ) ( become ( ( larger and ) larger ) ) ) ) ) ) ) ) ) . ) ) )
(ROOT (S (PP (IN As) (ADVP (JJR more) (CC and) (JJR more))) (NP (NN water) (NN vapor)) (VP (VBZ cools) (PP (IN into) (NP (NP (DT the) (NNS clouds)) (, ,) (NP (NP (DT the) (NN water) (NNS droplets)) (SBAR (WHNP (WDT that)) (S (VP (VBP form) (NP (NP (DT the) (NNS clouds)) (VP (VBN become) (S (ADJP (JJR larger) (CC and) (JJR larger)))))))))))) (. .)))
As more and more water vapor cools into the clouds, the water droplets that form the clouds become larger and larger.
(ROOT (S (NP (NNS Clouds)) (VP (VBP are) (VP (VBN formed) (PP (IN from) (NP (NN water) (NNS droplets))))) (. .)))