I should worry.
( I ( ( should worry ) . ) )
(ROOT (S (NP (PRP I)) (VP (MD should) (VP (VB worry))) (. .)))
I am too relaxed about losing my job.
( I ( ( ( am too ) ( relaxed ( about ( losing ( my job ) ) ) ) ) . ) )
(ROOT (S (NP (PRP I)) (VP (VBP am) (ADVP (RB too)) (VP (VBN relaxed) (PP (IN about) (S (VP (VBG losing) (NP (PRP$ my) (NN job))))))) (. .)))