先我们把句子的主干抓住:
I prefer take-home essays ,so you have time to edit and do more research. 我更喜欢带回家的论文,这样你就有时间编辑和做更多的研究.
这是用并列连词so连接的一个并列句。
再看because it is then really about the writing, 它是主句I prefer take-home essays的原因从句,与后半截的so you have time to edit and do more research是无关的。
在这个原因状语从句because it is then really about the writing中:是主系表结构,主语是it, 谓语动词是is, about the writing是表语, then和really都是状语。
供参考。
I主 prefer谓 take-home essays宾 because引导词 it主 is系 then really about the writing表语,...