My grandmom was pretty much a chain smoker.
( ( My grandmom ) ( ( ( was ( pretty much ) ) ( a ( chain smoker ) ) ) . ) )
(ROOT (S (NP (PRP$ My) (NN grandmom)) (VP (VBD was) (ADVP (RB pretty) (RB much)) (NP (DT a) (NN chain) (NN smoker))) (. .)))
She had a preferred brand to use for smoking. 
( She ( ( had ( a ( preferred ( brand ( to ( use ( for smoking ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (PRP She)) (VP (VBD had) (NP (DT a) (JJ preferred) (NN brand) (S (VP (TO to) (VP (VB use) (PP (IN for) (NP (NN smoking)))))))) (. .)))