不是“死记结构”，而是搞清时间、地点和原因
🧠 一、为什么需要 where / when / why？
先看两个句子对比：
- I remember the day. We first met on that day.
- ✅ I remember the day when we first met.
📌 关键点：
不是所有定语从句都在“修饰名词本身”，
有些是在补充 时间 / 地点 / 原因背景。
👉 这类信息，就交给 关系副词 来完成。
🗺️ 二、关系副词 where：连接“地点信息”
where = 表示地点，相当于 “in / at / on which”
📘 示例：
- This is the café where we usually meet.
- She returned to the town where she grew up.
🧠 判断方法（B网站逻辑版）：
1️⃣ 先行词是否是“地点概念”（place, city, room, website 等）
2️⃣ 从句中是否缺少“地点状语”
✔️ 同时满足 → 用 where
⏰ 三、关系副词 when：连接“时间背景”
when = 表示时间，相当于 “on / in / at which”
📘 示例：
- I’ll never forget the moment when he smiled.
- That was the year when everything changed.
⚠️ 易错提醒：
很多同学看到 time / day / year 就立刻用 which，
但如果从句缺的是“时间状语”，when 更自然。
❓ 四、关系副词 why：只服务一个词
why = 只修饰 reason
📘 示例：
- I don’t know the reason why she left.
- That’s the reason why he refused the offer.
📌 实用结论：
👉 看到 reason，优先考虑 why
👉 在写作中比 for which 更自然
🔄 五、where / when / why vs. which 的本质区别
📌 不是高级和低级的区别，而是：
- which：补充“名词本身的信息”
- where / when / why：补充“背景信息”
🔍 对比示例：
- The place which impressed me most was very quiet.（强调 place）
- The place where we stayed was very quiet.（强调经历）
⚠️ 六、写作中最容易犯的 3 个错误
❌ This is the place which I met him.
✔️ This is the place where I met him.
❌ I remember the day which we moved here.
✔️ I remember the day when we moved here.
❌ That’s the reason which he was angry.
✔️ That’s the reason why he was angry.
👉 本质问题：
把“背景状语”当成了“名词信息”。
✍️ 七、写作应用：让句子更有画面感
🔹 原句（平铺）
She mentioned a time. She felt very lost.
🔹 合并后
✅ She mentioned a time when she felt very lost.
🔹 写作升级
She mentioned a time when she felt very lost but learned a lot from it.
📍 B网站写作建议：
关系副词非常适合用在 回忆、经历、故事类段落 中。
📝 八、练习任务（逻辑判断）
请选择合适的关系副词（where / when / why）：
- This is the moment ___ I realized my mistake.
- She explained the reason ___ she changed her plan.
- That’s the village ___ my grandparents once lived.
👉 参考答案：
- when
- why
- where
真正掌握定语从句，不是背规则，而是先判断信息类型。
在 李校来了英语 的写作训练系统中，你会先被引导识别“这是时间、地点还是原因”，再自动匹配最合适的关系词。
当你从“选词”升级为“理解逻辑”，英语句子自然就顺了。