Questions & Answers about Hér eru þrjú sæti.
Why is the word for "three" þrjú instead of þrír?
Is sæti singular or plural here? It looks like the singular form!
It is plural here. Many neuter nouns in Icelandic look exactly the same in both their singular and plural forms when they are the subject of the sentence. So, eitt sæti means "one seat" and þrjú sæti means "three seats".
If sæti doesn't change, how can we tell the sentence is plural?