( ( Fish almost ) ( always ( ( reproduce sexually ) . ) ) )
(ROOT (S (NP (NN Fish) (RB almost)) (ADVP (RB always)) (VP (VB reproduce) (ADVP (RB sexually))) (. .)))
Fish almost always reproduce sexually.
(ROOT (S (NP (JJS Most) (NN fish)) (VP (VB reproduce) (PP (IN with) (NP (CD one) (DT another))) (ADVP (RB sexually))) (. .)))