0 the form of the verb used for actions or events that have been completed or have happened in a period of time up to now: --
1 the tense you use to talk about actions or events that happen in both the past and the present: --
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.
Vi kan slutföra det steg för steg hur lång vägen än är och den kan inte slutföras hur kort vägen än är om du inte ens markerar ditt fotavtryck.