Be sure to look around and compare before buying.
( ( ( ( Be ( sure ( to ( look around ) ) ) ) and ) ( compare ( before buying ) ) ) . )
(ROOT (S (VP (VP (VB Be) (ADJP (JJ sure) (S (VP (TO to) (VP (VB look) (PRT (RP around))))))) (CC and) (VP (VB compare) (PP (IN before) (NP (NN buying))))) (. .)))
Make sure to browse and make comparisons before purchasing.
( ( Make ( sure ( to ( ( ( ( browse and ) make ) comparisons ) ( before purchasing ) ) ) ) ) . )
(ROOT (S (VP (VB Make) (ADJP (JJ sure) (S (VP (TO to) (VP (VB browse) (CC and) (VB make) (NP (NNS comparisons)) (PP (IN before) (NP (NN purchasing)))))))) (. .)))