you should never , ever , leave a large dog alone with a toddler 
(ROOT (S (NP (PRP you)) (VP (MD should) (ADVP (RB never)) (, ,) (ADVP (RB ever)) (, ,) (VP (VB leave) (NP (DT a) (JJ large) (NN dog)) (ADVP (RB alone)) (PP (IN with) (NP (DT a) (NN toddler)))))))
(ROOT (S (NP (PRP )) (VP (MD ) (ADVP (RB )) (, ) (ADVP (RB )) (, ) (VP (VB ) (NP (DT ) (JJ ) (NN )) (ADVP (RB )) (PP (IN ) (NP (DT ) (NN )))))))