目录
一、原句
二、主句部分
三、定语从句部分
四、嵌套的定语从句部分
五、句子结构总结
六、为什么I who am only man who owns just his arms and his brains to ensure his preservation句子中有"I"，而who am neither rentier nor landlord没有
一、原句
But I, who am neither rentier nor landlord, I who am only man who owns just his arms and his brains to ensure his preservation, had to conduct myself differently.
来源：Why I Was a Burglar by Marius Jacob 1905
二、主句部分
But I - 主语
had to conduct - 谓语动词（动词短语）
myself - 宾语
differently - 状语（方式状语）
三、定语从句部分
句子中有两个定语从句，它们分别修饰主语“I”：
who am neither rentier nor landlord
who - 关系代词，引导定语从句，指代“I”
am - 系动词
neither rentier nor landlord - 表语（使用neither...nor结构表示否定）
who am only man who owns just his arms and his brains to ensure his preservation
who - 关系代词，引导定语从句，指代“I”
am - 系动词
only man - 表语
who owns just his arms and his brains to ensure his preservation - 嵌套的定语从句，修饰“man”
四、嵌套的定语从句部分
who owns just his arms and his brains to ensure his preservation
who - 关系代词，引导定语从句，指代“man”
owns - 谓语动词
just his arms and his brains - 宾语
to ensure his preservation - 不定式短语，作目的状语
五、句子结构总结
主句：But I... had to conduct myself differently.
定语从句1：who am neither rentier nor landlord （修饰主语“I”）
定语从句2：who am only man who owns just his arms and his brains to ensure his preservation （修饰主语“I”）
[ 嵌套定语从句：who owns just his arms and his brains to ensure his preservation （修饰“man”） ]
六、为什么I who am only man who owns just his arms and his brains to ensure his preservation句子中有"I"，而who am neither rentier nor landlord没有
I who am only man who owns just his arms and his brains to ensure his preservation
这里的“I”重复出现，是为了强调和明确主语。这种重复强调结构通常用于加强句子表达的主观色彩。
在这个结构中，“I” 在定语从句开头再次出现，强调了主语的存在，以及主语与其独特特征之间的关系。这种重复使用主语的方式通常带有一种强调或对比的意味。句子可以理解为对自己的身份或处境的进一步描述，强调自己不是拥有财富或地产的“rentier”或“landlord”，而是一个“只拥有自己的双臂和头脑来确保生存的人”。这种句式更具修辞效果。
第一个定语从句 使用 “who” 就足以指代主语 “I”，不需要重复使用 “I”。
第二个定语从句 重复使用 “I” 是为了强调主语的身份和特征，增强表达的效果。
