( ( These ( tiny ( water ( droplets form ) ) ) ) ( clouds . ) )
(ROOT (S (NP (DT These) (JJ tiny) (NN water) (NNS droplets) (NN form)) (VP (VBZ clouds)) (. .)))
These tiny water droplets form clouds.
(ROOT (S (NP (NNS Clouds)) (VP (VBP are) (VP (VBN formed) (PP (IN from) (NP (NN water) (NNS droplets))))) (. .)))