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从句系统课

第10课：插入语 — 从句体系最后一块拼图
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从句系统课 · 第10课
插入语
从句体系最后一块拼图 · 三种类型 · 位置规则
本课要点
① 插入语分三类：词 / 短语 / 句子（含从句型插入语）
② 判断插入语的方法：去掉后句子依然完整
③ 从句型插入语 — 如 I think / you know / as we know — 本质上是一个移除连接词的从句
① 三类总览
② 词+短语
③ 句子型
④ 位置规则
⑤ 练习总结
①
插入语 — 英语句子的"旁白"
插入语不属于主句的任何语法成分
插入语 = 不是从句、不是主句的一部分。
它是游离在主句结构之外的附加信息——去掉后句子依然完整。
类型形式例句
词副词/形容词Frankly, I don't care. / Surprising, he agreed.
短语介词短语/不定式To be honest, I don't know. / In my opinion, this is wrong.
句子从句/完整句I think he will come. / As we know, the earth is round.
判断插入语 = 删除测试
去掉插入语后，主句必须语法完整。
He, as everyone knows, is a good teacher.
→ 去掉 → He is a good teacher. ✅
⚠ 插入语 ≠ 从句
虽然有"从句型插入语"（as we know），但从语法上讲它不是真正的从句——它不充当主句的任何句子成分。真正的从句一定在主句中扮演角色（主语/宾语/定语/状语等），插入语什么也不扮演。
1/5
②
词型 + 短语型插入语 — 最常见也最易识别
看到逗号后面的副词，八成就是插入语
词型插入语（放在句首/句中/句尾，逗号隔开）
Frankly, I don't agree. — "老实说"
Sadly, he passed away. — "不幸的是"
Incidentally, I met her yesterday. — "顺便提一句"
He obviously doesn't care. — "他明显不在乎"
I disagree, however. — "然而，我不同意"
短语型插入语（介词/不定式/分词短语）
To be honest, I don't like it. — "坦白说"
In my opinion, he is wrong. — "在我看来"
Generally speaking, it's a good idea. — "一般来说"
Judging from his face, he is angry. — "从他的表情看"
⚠ 词和短语的标点规则
句首插入语：必须用逗号隔开 — Frankly, I don't care.
句中插入语：前后各一个逗号 — He, however, disagreed.
句尾插入语：前面加逗号 — I disagree, however.
2/5
③
句子型插入语 — "伪装成从句"的插入语
I think / you know / as we know — 它们不是从句
I think / you know / as we know 看起来像从句，但它们不充当主句的任何成分。
它们本质上是移除了连接词的从句——被"降级"为插入语。
插入语本质例句
I think省略了 that 的宾语从句的主句He I think is right. = I think (that) he is right.
you know省略了 that 的宾语从句的主句This you know is hard. = You know (that) this is hard.
as we knowas 关系代词从句He as we know is kind. = He, as we know, is kind.
I believe省略了 that 的宾语从句的主句It I believe is true. = I believe (that) it is true.
⚠ 关键理解
"I think" 出现在句子中间做插入语时，它不是宾语从句的主句——它是"被反插回去"的一个碎片。

正常顺序：I think (that) he is right. — I think 是主句，he is right 是宾语从句
插入语顺序：He, I think, is right. — "He is right" 是主句，"I think" 是插入语

核心：主句的角色变了。
3/5
④
插入语的位置规则 — 句首·句中·句尾
不同位置，不同效果
However, I disagree. 句首 — 开篇表态。however = "然而"。
I, however, disagree. 句中 — 插入主谓之间，强调对比。
I disagree, however. 句尾 — 后置补充，语气减弱。
As we all know, the Earth is round. 句首 — 从句型插入语在句首，起引导作用。
The Earth, as we all know, is round. 句中 — 同样意思，但插在主谓之间，语流更自然。
插入语 vs 从句 — 终极测试
The earth, as we know, is round.
→ 去掉 as we know：The earth is round. ✅ (主句完整) → 插入语

As we know, the earth is round.
→ 去掉 as we know：The earth is round. ✅ (主句完整) → 插入语

注意：这里的 as we know 不是定语从句（没有先行词），也不是宾语从句（不充当主句成分），就是插入语。
4/5
⑤
练习与全课总结 — 从句体系收官
最后三道题 + 10课全景
练习1：以下哪部分是插入语？
The plan, I believe, will work.
I believe 是插入语
I believe 是主句
练习2：以下哪项是插入语？
A. To be honest, I don't like it.
B. I didn't go because I was tired.
C. He passed the test, which surprised us.
练习3：I don't know, ___, what to do. 空格最适合填什么？
I must admit
I know
because I am busy
插入语 · 总结
1插入语分三类：词（frankly/honestly/obviously）、短语（to be honest/in my opinion）、句子（I think/as we know）。
2判断方法：去掉插入语 → 主句依然完整。插入语不充当主句的任何语法成分。
3句子型插入语（I think/you know）本质上是"主谓倒插"——正常的主句变成了附注。
4位置规则：句首/句尾一个逗号，句中和主句之间两个逗号。
从句系统课 · 全10课收官
1连接词总论 — 三分类框架 + 关节比喻 + 扮演测试
2名从·连词 → 3名从·关系代词 → 4名从·关系副词
5定语从句(上) → 6定语从句(下)
7状语从句(上) → 8状语从句(下)
9连接词总攻 — 一词多义收网 → 10插入语
5/5
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