这个英语句子怎么分析？

这句话翻译为：这门课程要求每一个人交一份至少两页至多四页的试卷。
其中，The course作主语，require作谓语，因为要主谓一致，所以加了s。
require动词，意为要求，其后的宾语从句要用虚拟语气，形式为：（should）+动词原形，其中should可以省略，所以从句中turn in（上交）用了动词原形。

This course requires that every student turn in a paper of two pages at least and four pages at most.
This course 主语
requires 谓语
that every student turn in a paper of two pages at least and four pages at most 宾语从句
every student 从句的主语
turn in 从句的谓语
a paper 从句的宾语
of two pages at least and four pages at most 介词短语做paper的后置定语
整句翻译：
这项课程要求每个学生上交一篇小论文，论文要求最少2页且不多于4页

that引导宾语从句，every student 做从句主语，turn in做从句的谓语，a paper做从句的宾语，of two papers at least and four pages at most做后置定语修饰a paper 。
a piece of paper 吧