she might not make for a while 
(ROOT (S (NP (PRP she)) (VP (MD might) (RB not) (VP (VB make) (PP (IN for) (NP (DT a) (NN while)))))))
(ROOT (S (NP (PRP )) (VP (MD ) (RB ) (VP (VB ) (PP (IN ) (NP (DT ) (NN )))))))