We really do appreciate your efforts, whatever amount you can contribute.
( We ( really ( ( do ( appreciate ( ( ( your efforts ) , ) ( ( whatever amount ) ( you ( can contribute ) ) ) ) ) ) . ) ) )
(ROOT (S (NP (PRP We)) (ADVP (RB really)) (VP (VBP do) (VP (VB appreciate) (NP (NP (PRP$ your) (NNS efforts)) (, ,) (SBAR (WHNP (WDT whatever) (NN amount)) (S (NP (PRP you)) (VP (MD can) (VP (VB contribute)))))))) (. .)))
We are pissed off if you can't give us more than two thousand dollars. 
( We ( ( are ( ( pissed off ) ( if ( you ( ( ca n't ) ( ( give us ) ( ( more ( ( than two ) thousand ) ) dollars ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (PRP We)) (VP (VBP are) (VP (VBN pissed) (PRT (RP off)) (SBAR (IN if) (S (NP (PRP you)) (VP (MD ca) (RB n't) (VP (VB give) (NP (PRP us)) (NP (QP (JJR more) (IN than) (CD two) (CD thousand)) (NNS dollars)))))))) (. .)))