一个英语句子结构的分析---在线等---高手进Other tests have shown that laughter appears to be capable of reducing the effect of pain on the body.In one experiment doctors produced pain in groups of students who listened to different rad

一个英语句子结构的分析---在线等---高手进Other tests have shown that laughter appears to be capable of reducing the effect of pain on the body.In one experiment doctors produced pain in groups of students who listened to different rad
一个英语句子结构的分析---在线等---高手进
Other tests have shown that laughter appears to be capable of reducing the effect of pain on the body.In one experiment doctors produced pain in groups of students who listened to different radio programs.The group,which tolerated the pain for the longest time,was the group,which listened to a funny program.The reason why laughter can reduce pain seems to be that it helps to produce endorphins（内啡肽）in the brain.
分析这个句子结构：The reason why laughter can reduce pain seems to be that it helps to produce endorphins（内啡肽）in the brain.

一个英语句子结构的分析---在线等---高手进Other tests have shown that laughter appears to be capable of reducing the effect of pain on the body.In one experiment doctors produced pain in groups of students who listened to different rad
1.句型：The reason why…… 意为“……的原因”
The reason why laughter can reduce pain 笑能够减少疼痛的原因
2.动词seem的用法：seems to be 意为“似乎是”
3.表语从句that it helps produce endorphins（内啡肽）in the brain
它（笑）能帮助产生大脑中的内啡肽
整合起来的句意就是：
笑能够减少疼痛的原因似乎是它能帮助产生大脑中的内啡肽.
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主语 the reason
谓语 seems to be
宾语从句 that后面

句子主干的主语是The reason，谓语seems to be。
这个句子包含两个从句：
【The reason why laughter can reduce pain 】这是一个定语从句，先行词是reason，why是关系副词，“笑能减轻疼痛的原因”.......
The reason why laughter can reduce pain seems to be ...

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句子主干的主语是The reason，谓语seems to be。
这个句子包含两个从句：
【The reason why laughter can reduce pain 】这是一个定语从句，先行词是reason，why是关系副词，“笑能减轻疼痛的原因”.......
The reason why laughter can reduce pain seems to be 【that it helps to produce endorphins in the brain】.此处是表语从句，that是引导词，不充当句子成分，但不能省略。

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主语是“the reason”, "why laughter can reduce pain " 同位语从句，seems to be 应该是谓语，that是宾语，后面是宾语从句。

The reason /（why laughter can reduce pain-是the reason 的同位语）到这里为止可看成是主语 /seems to be( that it helps to produce endorphinsin the brain整块做seem to be 里的that 从句.)-这是整个句子的谓语和宾语