何も～ない・
A question word followed by も and a negative ending excludes every possible person, thing, or place: nobody, nothing, or nowhere.
How the pattern works
The question word represents a whole set of possibilities. Adding も and making the sentence negative rejects every member of that set. The negative ending is essential.
People, things, and places
What happens to other particles
In the basic subject and object patterns, も normally takes the place of が or を. Other particles needed to show a destination, recipient, partner, or source usually remain before も.
Keeping a necessary particle
An unspecified person versus no one
A question word with か leaves one member unspecified: someone or something. A question word with も and a negative ending excludes every member: no one or nothing.
More examples
その部屋にはだれもいなかった。
There was no one in that room.
Analyze今日は何も買いません。
I will not buy anything today.
Analyze休みの日はどこにも出かけなかった。
I did not go out anywhere on my day off.
Analyzeまだだれからも返事が来ていません。
No reply has come from anyone yet.
Analyze暗くて、何も見えません。
It is dark, and I cannot see anything.
Analyze会議ではだれも反対しませんでした。
No one objected at the meeting.
Analyze鍵はどこにも見つかりませんでした。
The key was nowhere to be found.
Analyze