It was going to be a hot day. 
( It ( ( was ( going ( to ( be ( a ( hot day ) ) ) ) ) ) . ) )
(ROOT (S (NP (PRP It)) (VP (VBD was) (VP (VBG going) (S (VP (TO to) (VP (VB be) (NP (DT a) (JJ hot) (NN day))))))) (. .)))
It was a very cold day.
( It ( ( was ( a ( ( very cold ) day ) ) ) . ) )
(ROOT (S (NP (PRP It)) (VP (VBD was) (NP (DT a) (ADJP (RB very) (JJ cold)) (NN day))) (. .)))