Questions & Answers about Trærne omringer hagen.
Because Norwegian often puts the definite article at the end of the noun instead of using a separate word like the.
- tre = tree
- trær = trees
- trærne = the trees
So -ne is the definite plural ending here.
Because tre has an irregular plural.
Its forms are:
- et tre = a tree
- treet = the tree
- trær = trees
- trærne = the trees
So this is just a noun form you need to learn as a set.
For the same reason: Norwegian usually marks definiteness with an ending.
- en hage = a garden
- hagen = the garden
Here, -n is the definite singular ending for this noun.