(I am speaking in human terms because of your natural limitations.) For just as you presented (parestēsate | παρεστήσατε | aor act ind 2 pl) your members as slaves to impurity and to lawlessness leading to more lawlessness, so now present (parastēsate | παραστήσατε | aor act imperative 2 pl) your members as slaves to righteousness, leading to sanctification.
Reference
Romans 6:19
Sequence
28