you look at yourself up and down to see if there is anything wrong with you.这里为什么用anything?

题目

you look at yourself up and down to see if there is anything wrong with you.这里为什么用anything?
这里为什么用anything?又不是否定句,为什么不用something,是什么原因?用something 代替行不行?

答案

当if 引导条件句或宾语从句时,不定代词必须用anything.
使用anything 的场合是：
1 疑问句
2 否定句
3 if
4 作“任何事”讲时,用于肯定句.如 Anything has a hard beginning.