Questions & Answers about Vem är skyldig?
Because är is simply the Swedish present-tense form of the verb vara, which means to be.
So the sentence is built very directly:
- vem = who
- är = is
- skyldig = guilty / at fault / liable
Unlike English, Swedish does not need do for this kind of question. It just uses the normal verb to be.
Yes, in this sentence it works very much like English who.
Vem is the interrogative pronoun used for people:
- Vem är det? = Who is it?
- Vem kommer? = Who is coming?
- Vem är skyldig? = Who is guilty? / Who is at fault?
A useful thing to remember is that Swedish does not change vem the way English sometimes changes who/whom in formal usage. Swedish just uses vem.