Questions & Answers about Vi må bevare naturen.
Vi is the subject form of we.
- vi = we
- oss = us
In Vi må bevare naturen, vi is doing the action, so Norwegian uses the subject form.
Compare:
- Vi må bevare naturen = We must preserve nature
- Han hjelper oss = He helps us
Må is a modal verb meaning must, have to, or sometimes need to, depending on context.
In this sentence, it expresses necessity or obligation:
- Vi må bevare naturen = We must / have to preserve nature
A useful point: må is the present-tense form, but in English it often translates naturally as must or have to.