the way he did it was different from which we were used to中' he did it"部分是"the way"什么从句吗?

首先句子错误，后面不能用which，而要用what引导。

the way后面是定语从句，但由于定从里没有how这个关系副词，所以后面不能用how，记住，the way后面的定从可以有三种引导方式：that、in which或者省略，这里是第三种。后面what we were used to是宾从。

定语 ，the way he did （it） was different from which we were used to 括号里的it我觉得应该去掉

the way which he did it, which省略了

定从

定从
the way was different from (the way)

是方式状语从句，高一课程学的。
the way （）he did it，括号中可以加that，可以加in which 或者省略，只有这3种答案
这里的way不是定语，而是和the way 一起构成了he did it 的方式状语