It's really hard to say exactly where I belong
这里的where是做say的宾语 因为where是地点副词 可以不用to
但是如果是 It's really hard to say exactly which place I belong to这个to就不能省了那where是不是做宾语从句的状语呢？to可不可以放在which签呢，其实就是跟关系副词在定语从句中的用法一样的，是吧？It's really hard to say exactly where I belong where是状语