A: I got in trouble and I didn't do nothing.

我遇到麻烦了，什么也做不了。

I didn't do nothing. （口语，重复使用否定词，仍然否定，加强否定）= I didn't do anything. = I did nothing.

B: What did you get in trouble for doing nothing about?

你遇到麻烦啥也不能做，到底为了什么？

what...about = what...for = why

A: ...

B: What were you doing nothing of?

你因何无所事事？

what...of = what...about = what ...for = why