Questions & Answers about Já, búðin er opin.
How would I ask the question that this sentence is answering?
Since this lesson is about Yes/No questions, you form it by swapping the subject (búðin) and the verb (er) to put the verb first. This creates the question: Er búðin opin? (Is the shop open?).
Does the word Já change the word order of the rest of the sentence?
No. Words like Já (Yes) and Nei (No) sit outside the main sentence and are separated by a comma. The main clause, búðin er opin, keeps the standard statement word order where the verb comes right after the subject.
Where is the word for "the" in búðin?
In Icelandic, the definite article ("the") attaches to the end of the noun instead of being a separate word before it. Búð means "a shop", and adding the feminine ending -in makes it búðin ("the shop").
Why is the word for open spelled opin here?
Adjectives in Icelandic change their endings to match the gender of the noun they describe. Because búð is a feminine noun, the adjective takes the feminine form opin. If the noun were masculine or neuter, you would see different endings like opinn or opið.