( ( A gas ) ( ( has ( ( no ( definite shape ) ) ( of ( ( ( its own ) and ) ( no ( defined volume ) ) ) ) ) ) . ) )
(ROOT (S (NP (DT A) (NN gas)) (VP (VBZ has) (NP (NP (DT no) (JJ definite) (NN shape)) (PP (IN of) (NP (NP (PRP$ its) (JJ own)) (CC and) (NP (DT no) (JJ defined) (NN volume)))))) (. .)))
A gas has no definite shape of its own and no defined volume.
(ROOT (S (NP (NNP Gas)) (VP (VBZ has) (NP (NP (DT no) (JJ definite) (NN volume)) (CC and) (NP (DT no) (JJ definite) (NN shape)))) (. .)))
Gas has no definite volume and no definite shape.