0 past simple of "can", used to talk about what someone or something was able or allowed to do: --
1 used as a more polite form of "can" when asking for permission: --
2 used as a more polite form of "can" when asking someone to provide something or do something: --
3 used to express possibility, especially slight or uncertain possibility: --
4 used for making a suggestion: --
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.