求大神英语句子分析'''谢谢!

问题描述:

求大神英语句子分析'''谢谢!
What you can't do is leave it until a few days before the start of term.这句话是主语从句吗?宾语是什么?leave后面怎么出现了it?it在这里作什么呢?

完整的句子是What you can't do is that you leave it untial a few days before the start of term.你不能做的,就是“把它抛在一边,直到学期开始前几天才想起来”.是主语从句 + 表语从句这个句子主结构是 主语从句+...