Barnet sidder på sit tæppe i stuen.

The child sits on its blanket in the living room.

Breakdown of Barnet sidder på sit tæppe i stuen.

• i: in
• på: on
• sidde: to sit
• stuen: the living room

Questions & Answers about Barnet sidder på sit tæppe i stuen.

Why is it Barnet and not barn or det barn?

Danish usually marks definiteness with an ending on the noun, not with a separate word like English the.

• barn = a child (indefinite, singular)
• barnet = the child (definite, singular)

You normally don’t say det barn to mean the child on its own.
You can combine a demonstrative with the definite form for emphasis:

• det barnet = that (particular) child

But in a simple neutral sentence, Barnet sidder… is just The child is sitting…

Why does barnet end in -et, while stuen ends in -en?

Danish has two grammatical genders:

• common gender (former “utrum”) → indefinite article en, definite ending -en
  • en stue → stuen (a living room → the living room)
• neuter gender → indefinite article et, definite ending -et
  • et barn → barnet (a child → the child)

So:

• et barn → barnet
• en stue → stuen

You simply have to learn the gender of each noun (there’s no fully reliable rule).