非限制性定语从句结构详解：提升句子完整性与书面表达层次

透彻理解非限制性定语从句与限制性从句的区别，强化写作规范性

🔹 一、非限制性定语从句定义及作用

📍 非限制性定语从句用于对先行词补充说明，而不影响句子核心意思，写作中常用以增加语言的完整性和文采。
示例：

His brother, who is an engineer, works abroad.

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🔹 二、核心特点与限制性从句区别

特点	限制性定语从句	非限制性定语从句
功能	必须限定先行词	仅补充说明
标点	无逗号	需用逗号
引导词	that, which, who	which, who, whose（不可用 that）

✅ 示例对比：

• 限制性：Students who study hard pass exams easily.
• 非限制性：Tom, who studies hard, always gets good grades.

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🔹 三、常用引导词及典型句式

✅ who / whom — 用于人
✅ which — 用于物
✅ whose — 表示所属关系
✅ where / when — 表示地点和时间
示例：

My house, which has a large garden, is near the park.
Mr. Li, whose son is a doctor, is very proud.

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🔹 四、非限制性从句易错点总结

❌ 不可用 that 引导：

错误： The car, that I bought last year, is red.
正确： The car, which I bought last year, is red.

⚠️ 切勿忘记逗号：

I met Sarah who is my neighbor. (✘)
I met Sarah, who is my neighbor. (✔)

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🔹 五、实用写作场景

📑 在议论文、学术写作及正式报告中恰当使用非限制性定语从句，可使句子内容连贯、表达更精炼。
范例：

Air pollution, which affects millions of people, must be controlled.
The museum, where the painting is displayed, attracts tourists worldwide.

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🔹 六、专项训练

请尝试将提示信息扩写为包含非限制性定语从句的句子：

1. My uncle (he lives in Canada) often calls me.
2. This novel (it won an award) is very popular.
3. The library (it opens at 9 a.m.) is next to my school.

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非限制性定语从句是写作高级句型的代表结构，灵活运用能显著提升语言表达的连贯性与优美度。建议大家配合【李校来啦英语】的句型专项模块进行针对性训练，及时查漏补缺，写作水平稳步提升！