帮忙语法问题我看到一句定语从句，从句是bywhichmeans.
我看到一句定语从句，从句是by which means...，请问可以用介词+which作主语吗
做主语是不行的,但在定语从句中BY WHICH MEANS 是一个EXCELLENT的用法...没有用介词+WHICH作主语的