It was impossible not to remain humble in these circumstances.
( It ( ( was ( impossible ( not ( to ( ( remain humble ) ( in ( these circumstances ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (PRP It)) (VP (VBD was) (ADJP (JJ impossible) (S (RB not) (VP (TO to) (VP (VB remain) (ADJP (JJ humble)) (PP (IN in) (NP (DT these) (NNS circumstances)))))))) (. .)))
We were humble because the situation would have been awkward otherwise.
( We ( ( ( were humble ) ( because ( ( the situation ) ( would ( have ( been ( awkward otherwise ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (PRP We)) (VP (VBD were) (ADJP (JJ humble)) (SBAR (IN because) (S (NP (DT the) (NN situation)) (VP (MD would) (VP (VB have) (VP (VBN been) (VP (VBG awkward) (ADVP (RB otherwise))))))))) (. .)))