I took to him at once.
( I ( ( ( took ( to him ) ) ( at once ) ) . ) )
(ROOT (S (NP (PRP I)) (VP (VBD took) (PP (TO to) (NP (PRP him))) (PP (IN at) (NP (RB once)))) (. .)))
I liked him instantly. 
( I ( ( ( liked him ) instantly ) . ) )
(ROOT (S (NP (PRP I)) (VP (VBD liked) (NP (PRP him)) (ADVP (RB instantly))) (. .)))