( ( As ( the ( water evaporates ) ) ) ( , ( it ( ( will ( ( provide humidity ) ( to ( the plant ) ) ) ) . ) ) ) )
(ROOT (S (PP (IN As) (NP (DT the) (NN water) (NNS evaporates))) (, ,) (NP (PRP it)) (VP (MD will) (VP (VB provide) (NP (NN humidity)) (PP (TO to) (NP (DT the) (NN plant))))) (. .)))
As the water evaporates, it will provide humidity to the plant.
(ROOT (S (NP (NNP Humidity) (NNP happens)) (VP (VBZ happens) (SBAR (WHADVP (WRB when)) (S (NP (JJ liquid) (NN water)) (VP (VBZ evaporates))))) (. .)))