To be sure, not all auctions are rip-offs.
( ( To ( be sure ) ) ( , ( ( not ( all auctions ) ) ( ( are rip-offs ) . ) ) ) )
(ROOT (S (S (VP (TO To) (VP (VB be) (ADJP (JJ sure))))) (, ,) (NP (RB not) (DT all) (NNS auctions)) (VP (VBP are) (ADJP (JJ rip-offs))) (. .)))
Every single auction is a rip-off.
( ( Every ( single auction ) ) ( ( is ( a rip-off ) ) . ) )
(ROOT (S (NP (DT Every) (JJ single) (NN auction)) (VP (VBZ is) (NP (DT a) (NN rip-off))) (. .)))