Did he help anybody?
1) No, he didn't help anybody.
2) No, he helped nobody.
What is the difference on '1' and '2'?
Are you waiting for somebody?
3) No, I am not waiting for anybody.
4)) No, I am waiting for nobody.
What is the difference between '3' and '4'.
5) Time doesn't wait for anybody.
6) Time waits for nobody.
Any difference here?