何も・誰も・どこにも
nothing, no one, nowhere (with a negative)
Question word + も + negative
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A question word plus も, with a negative verb, makes "no" words:
- 何も〜ない: nothing
- 誰も〜ない: no one
- どこにも〜ない: nowhere
今日は何も食べていません, "I haven't eaten anything today"; 誰もいません, "there's nobody here".
は, が and を disappear before も, but other particles stay in front of it: どこにも行かない, "not go anywhere"; 誰にも言わない, "not tell anyone".
Compare 何か, "something": the question-word-plus-か words are for "some", the も words for "none". With a positive verb, a couple of them mean "every" instead: いつも is "always", and どこも is "everywhere": どこも人が多い, "it's crowded everywhere".
Examples
今日は何も食べていません。
I haven't eaten anything today.
教室には誰もいません。
There's nobody in the classroom.
週末はどこにも行きませんでした。
I didn't go anywhere at the weekend.
質問は何もありません。
I don't have any questions.
このことは誰にも言わないでください。
Please don't tell anyone about this.