Here is my sentence of question このきょしつにだれがいますか . I believe it means, "Who is in this classroom?" although I read in my book (Genki 1) that it がいます could also mean that someone has something so would this instead mean, "Whose classroom is this?"
This whole がいますか and がありますか section (especially in question form) is giving me a rough time. I'd appreciate any help.