英语长句子，主谓宾在哪，请分析分析，谢谢。写得好的加分

Question

young brains may be especially able to boost the brain power through exercise, suggested another of Greenough's experiments that showed the most significant changes in the brain occurred among rats that had been exercised when very young.
这个句子 主语谓语宾语在哪啊，may be able to , suggested, occured 两个that
，这么长的句子，老外真能写。
据格里诺的另一组实验显示，年轻的大脑尤其能够通过运动来增强能力。这组实验表明，从小就锻炼的老鼠，其大脑的变化最为显著。
两个that 分别干嘛的？ 我觉得两个that都是引导定语从句并在从句中充当主语的。
我又研究了研究，正常顺序应该是这样的：
another of Greenough's experiments that showed the most significant changes in the brain occurred among rats that had been exercised when very young 这是主语）+ （suggested 这是谓语）+（young brains may be especially able to boost the brain power through exercise最后这是宾语）.

Answer 1

young brains may be especially able to boost the brain power through exercise
年轻大脑尤其能够通过运动来增强能力

suggested another of Greenough's experiments
这个是主句。主语是格里诺的实验，谓语表明，宾语是上一句“年轻大脑尤其能够通过运动来增强能力”
这是个倒装句，正常语序是another of Greenough's experiments suggested
格里诺的实验表明

experiments that showed the most significant changes in the brain occurred among rats
that后面的是experiments实验内容，老鼠显出了最显著的变化

rats that had been exercised when very young
that后面修饰rats老鼠，从小受训练的老鼠。

Answer 2

主语：your brain
谓语：may be especially able to boost
宾语：the brain power
其他的都是各种状语和从句。

Answer 3

"young brains may be especially able to boost the brain power through exercise"宾语，“suggested”谓语，“another of Greenough's experiments”主语。“that showed the most significant changes in the brain occurred among rats” 定于从句，修饰“experiments”；“that had been exercised when very young” 定于从句，修饰“rats”。
我看了一下，你的理解是对的。

Answer 4

主语为your brain 谓语为may be especially able to boost 宾语为the brain power 两个that确实引导定从并在其中做主语