( ( In ( one year ) ) ( ( the Earth ) ( ( would ( have ( made ( ( one ( complete orbit ) ) ( about ( the Sun ) ) ) ) ) ) . ) ) )
(ROOT (S (PP (IN In) (NP (CD one) (NN year))) (NP (DT the) (NN Earth)) (VP (MD would) (VP (VB have) (VP (VBN made) (NP (NP (CD one) (JJ complete) (NN orbit)) (PP (IN about) (NP (DT the) (NNP Sun))))))) (. .)))
In one year the Earth would have made one complete orbit about the Sun.
(ROOT (S (NP (PRP It)) (VP (VBZ takes) (PP (IN about) (NP (NP (CD one) (NN year)) (PP (IN for) (NP (NN earth))))) (S (VP (TO to) (VP (VB orbit) (NP (DT the) (NN sun)))))) (. .)))
It takes about one year for earth to orbit the sun.