请问下面的英语句子的主语是什么啊
问题描述：
请问下面的英语句子的主语是什么啊
The large amount of material that has to be memorized makes chinese history a boring subject.
整个The large amount of material that has to be memorized 算是一个主语吗,
还是The large amount of material 这个算是主语啊,如何理解啊,
答
The large amount of material 是主语,that has to be memorized 是个定语从句,你可以这样理解,把 that has to be memorized 去掉,你看这还是个完整的句子.这句话的意思就是说,大量需要背诵的材料使得中国历史是门很枯燥的的学科.