than you could have guessed at the beginning 
(ROOT (SBAR (IN than) (S (NP (PRP you)) (VP (MD could) (VP (VB have) (VP (VBN guessed) (PP (IN at) (NP (DT the) (NN beginning)))))))))
(ROOT (SBAR (IN ) (S (NP (PRP )) (VP (MD ) (VP (VB ) (VP (VBN ) (PP (IN ) (NP (DT ) (NN )))))))))