Originally posted by Mandylion
I would also use for #1 "--授業へ来ない人はいますか。" jyugyou he konai hito wa imasuka? Wouldn't 授業に出ない予定がある人は誰? jyugyou ni denai yotei ga aru hito ha dare? be more correct? I'm not too sure...
In all, Alvo's is fine too, and they mean more or less the same. I think Alvo's is more like "who is planning on not coming to class on Wednesday?" (ie who probably won't come to class but might) where mine is "who is not coming to class on Wednesday."(ie no chance they will come. Only a slight difference and it depends on the mood you want to give it.