question word + か／も(+neg)
someone / no one; something / nothing
Question word + か makes "some-"; question word + も with a negative makes "no-" / "none".
教室にだれもいません。
きょうしつに だれも いません。
There is no one in the classroom.
Which pattern is each sentence using?
教室にだれもいません。
There is no one in the classroom.