Skjalið er á skrifstofunni.

The document is at the office.

Breakdown of Skjalið er á skrifstofunni.

• vera: to be
• á: at
• skrifstofan: the office
• skjalið: the document

Questions & Answers about Skjalið er á skrifstofunni.

What does the ending -ið in Skjalið do?

It’s the suffixed definite article for neuter singular in the nominative.

• Base noun: skjal (a document, neuter).
• Definite form: skjalið (the document).
  Icelandic typically marks definiteness by adding a suffix rather than a separate word for the.

Why does skrifstofunni end with -unni?

Because it’s dative singular definite of a feminine noun.

• Base noun: skrifstofa (an office, feminine).
• Dative singular (indefinite): skrifstofu.
• Dative singular (definite): skrifstofunni.
  The preposition á uses the dative for a stationary location, so the noun must be in dative, and the definite article is suffixed as -inni (spelled here as -unni because of the preceding vowel).

Why does á take the dative here and not the accusative?

With many Icelandic prepositions (including á), case depends on meaning:

• Dative = location/state: Ég er á skrifstofunni (I am at the office).
• Accusative = motion/into: Ég fer á skrifstofuna (I go to the office).

Could I use í instead of here?