Learn Icelandic: Eruð þið úti? - Are you plural outside?

In Icelandic, you make a yes/no question by swapping the verb and the subject. The regular statement "You are outside" is Þið eruð úti, so to ask it as a question, you flip the first two words to make Eruð þið úti?

What is the difference between þú and þið?

They both mean "you", but you use þú when talking to just one person and þið when talking to two or more people (like "y'all" or "you guys").

Why is the verb form eruð instead of eru?

Verbs in Icelandic change to match the subject of the sentence. The verb vera (to be) becomes eruð when paired with þið (you plural). If the subject were þeir, þær, or þau (they), the verb would be eru.

I have seen the word út for "outside". Why is it úti here?

Úti is used when someone or something is already outside. Út is used when there is movement, like walking out of a house. Since this sentence is asking about where the people currently are, it uses the stationary word úti.