帮忙分析一下这个句子的结构：原句：To these indirect presumptions that our sensations,following the mutations of our capacity for feeling,are always undergoing an essential change,must be added another presumption,based on what must happen in the brain. 英语
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【答案】 可以从这个句子中分离出如下几句话：
1、句子主干结构：To these indirect presumptions must be added another presumption, 这其实是一个倒装句；B must be added A,其正常语序应该是A must be added to B.此处的A=another presumption, B=these indirect presumptions 当然A和B后边分别跟有定语结构,这样就难上加上,把句子搞得很复杂,蛮吓人的,呵呵；
2、based on what must happen in the brain.正是修饰A的v-ed短语,即非谓语动词的一种,作A的后置定语,而这个动词短语中又包括what引导的宾语从句.
3、that our sensations ,following the mutations of our capacity for feeling,are always undergoing an essential change.这是修饰B的后置定语,而在这个定语从句中又插入了现在分词短语following the mutations of our capacity for feeling作伴随状语.
好,以上句子分析清楚了.