As I recall, I've never asked you for a contribution...until now.
( ( ( ( ( As ( I recall ) ) ( , ( I ( ( 've never ) ( ( asked you ) ( for ( a contribution ) ) ) ) ) ) ) ... ) ( until now ) ) . )
(ROOT (S (S (SBAR (IN As) (S (NP (PRP I)) (VP (VBP recall)))) (, ,) (NP (PRP I)) (VP (VBP 've) (ADVP (RB never)) (VP (VBN asked) (NP (PRP you)) (PP (IN for) (NP (DT a) (NN contribution)))))) (: ...) (FRAG (X (IN until)) (NP (RB now))) (. .)))
I've never asked you for a donation, but I will now.
( ( ( ( ( I ( ( 've never ) ( ( asked you ) ( for ( a donation ) ) ) ) ) , ) but ) ( I ( will now ) ) ) . )
(ROOT (S (S (NP (PRP I)) (VP (VBP 've) (ADVP (RB never)) (VP (VBN asked) (NP (PRP you)) (PP (IN for) (NP (DT a) (NN donation)))))) (, ,) (CC but) (S (NP (PRP I)) (VP (MD will) (ADVP (RB now)))) (. .)))