YOU SAID:
Guess who is not coming
INTO JAPANESE
誰が来ていないのか
BACK INTO ENGLISH
Who has not come?
INTO JAPANESE
誰が来なかったのですか?
BACK INTO ENGLISH
Who did not come?
INTO JAPANESE
誰が来なかったの?
BACK INTO ENGLISH
Who did not come?
You've done this before, haven't you.