0 used instead of "who" as the object of a verb or preposition: --
1 used as the object of a verb or after a preposition when referring to a particular person or when adding information about a person just mentioned: --
2 used esp. in questions as the object of a verb or after a preposition, when asking which person or people, or when asking what someone’s name is: --
We can complete it step by step however long the road is and it can't be completed however short the road is if you don't even mark your footprint.
We kunnen het stap voor stap voltooien, hoe lang de weg ook is en het kan niet worden voltooid, hoe kort de weg ook is, als je niet eens je voetafdruk markeert.