something that has to do with making junk.详解这句话的语法

这不是 完整的一句话
=his job is something that has to do with making junk.
他的工作 是做跟制造垃圾相关的工作
his job 是主语 is 是系动词
something是表语 后面是定语从句
that是关系代词 代替先行词 引导定语从句 并作 定从中的主语
has to do with 是定从中的谓语 making junk是定从中的宾语.
注意 这是 sth have to do with sth句型 某事与某事有关
不是 have sth to do with sth 与某事有关
因为 that 代替something 作的是 定从中 的主语
have to do with 本来就是 与.有关 的意思
课文原文是Or if he is,“Something that has to do with making junk,I think.Same as everybody else.”
如果他非常善于观察,他会说,"我想,是做跟制造垃圾相关的工作吧.跟每个人都 一样."

has something to do with 是个词组，意思是与。。。有关。
所以这句话的意思是 和制造垃圾有关的事情。

something that has to do with making junk
最好改为下面句子
Something that has been used to do with making junk
Something that must be used to do with making junk
句子意思：用来处理制造垃圾的某些事情