which I believe would also be kant's作为修饰Proposal的非限制定语从句, which在其中作什么成分?为什么我觉得即是作believe的宾语又是作would also be的主语。。。不是说关系代词只能作主语或者宾语其中之一的吗?麻烦帮忙分析一下谢谢了