We shall return to this point later.
( We ( ( shall ( ( return ( to ( this point ) ) ) later ) ) . ) )
(ROOT (S (NP (PRP We)) (VP (MD shall) (VP (VB return) (PP (TO to) (NP (DT this) (NN point))) (ADVP (RB later)))) (. .)))
We will come back to this in a few minutes.  
( We ( ( will ( ( come back ) ( to ( this ( in ( a ( few minutes ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (PRP We)) (VP (MD will) (VP (VB come) (PRT (RP back)) (PP (TO to) (NP (NP (DT this)) (PP (IN in) (NP (DT a) (JJ few) (NNS minutes))))))) (. .)))