•\x05when it comes to sth中的 it到底是什么成分?指的是什么呢?

问题描述:

•\x05when it comes to sth中的 it到底是什么成分?指的是什么呢?
When it comes to German,I know nothing.

是真正主语.When it comes to German,I know nothing,这个句子可以改写成为:When we / you / people talk about German,I know nothing.也就是说,when it comes to something=== when we / you talk about somethin...