Perhaps we should prepare a militia.
( Perhaps ( we ( ( should ( prepare ( a militia ) ) ) . ) ) )
(ROOT (S (ADVP (RB Perhaps)) (NP (PRP we)) (VP (MD should) (VP (VB prepare) (NP (DT a) (NN militia)))) (. .)))
We shouldn't bother preparing a militia.
( We ( ( ( should n't ) ( bother ( preparing ( a militia ) ) ) ) . ) )
(ROOT (S (NP (PRP We)) (VP (MD should) (RB n't) (VP (VB bother) (S (VP (VBG preparing) (NP (DT a) (NN militia)))))) (. .)))