非谓语动词和从句的关系详解
可以先记住一个核心观点:
非谓语动词本质上经常是“从句的简化形式”。
它可以把原本较长的从句压缩成更短、更紧凑的结构。
也就是说,很多非谓语结构都可以还原成一个从句;反过来,很多从句也可以简化成非谓语结构。
1. 先明确:从句和非谓语的共同点
从句和非谓语都可以表达一个“附加动作”或“附加信息”。
例如:
The boy who is standing there is my brother.
站在那里的那个男孩是我弟弟。
这里:
who is standing there
是 定语从句,修饰 the boy。
也可以改成:
The boy standing there is my brother.
这里:
standing there
是 现在分词短语,也是修饰 the boy。
这两句话表达的意思基本一样。
所以你可以理解为:
从句 = 完整句子形式的附加信息
非谓语 = 压缩后的附加信息
2. 从句和非谓语的最大区别
从句有自己的主语和谓语
例如:
The boy who is standing there is my brother.
定语从句是:
who is standing there
其中:
| 成分 | 内容 |
|---|---|
| 主语 | who |
| 谓语 | is standing |
从句内部有自己的主谓结构。
非谓语没有真正的谓语
The boy standing there is my brother.
这里:
standing there
不是完整句子。
它没有真正的谓语,也没有明确写出的主语。
但是它有一个隐藏的逻辑主语:
standing 的逻辑主语 = the boy
所以:
The boy standing there
= the boy who is standing there
3. 非谓语为什么可以替代从句?
因为英语为了简洁,经常把重复的信息省略掉。
看这个句子:
The boy who is standing there is my brother.
这里 who 指代:
the boy
所以从句可以理解为:
the boy is standing there
而主句里已经有 the boy 了,所以从句中的:
who is
可以省略,留下:
standing there
于是变成:
The boy standing there is my brother.
也就是说:
当从句的主语和主句中的某个名词一致时,从句常常可以简化成非谓语。
4. 非谓语和定语从句的关系
这是最常见、最重要的一类关系。
定语从句修饰名词,而非谓语短语也可以修饰名词。
4.1 现在分词 doing ≈ 主动 / 进行的定语从句
从句形式
The girl who is sitting by the window is my classmate.
坐在窗边的女孩是我的同学。
非谓语形式
The girl sitting by the window is my classmate.
这里:
sitting by the window
= who is sitting by the window
因为:
the girl is sitting by the window
girl 和 sit 是主动关系,而且动作正在进行,所以用 doing。
再看:
The man who is talking to the teacher is my father.
正在和老师说话的男人是我父亲。
可以改成:
The man talking to the teacher is my father.
4.2 过去分词 done ≈ 被动的定语从句
从句形式
The book which was written by him is famous.
他写的那本书很有名。
非谓语形式
The book written by him is famous.
这里:
written by him
= which was written by him
因为:
the book was written by him
book 和 write 是被动关系,所以用 done。
再看:
The window which was broken by the boy has been repaired.
被那个男孩打破的窗户已经修好了。
可以改成:
The window broken by the boy has been repaired.
4.3 不定式 to do ≈ 将来 / 目的 / 要做的定语从句
不定式做定语时,常表示:
将要做的、可以做的、需要做的
例如:
I have a lot of homework to do.
我有很多作业要做。
可以理解为:
I have a lot of homework that I need to do.
这里:
to do
表示“还没有做,将要做”。
再看:
He is the first person to arrive.
他是第一个到达的人。
可以理解为:
He is the first person who arrived.
不过这里不是单纯的进行或被动,而是带有“第一个做某事”的意义,所以用不定式。
4.4 对比总结:非谓语修饰名词
| 原从句 | 非谓语 | 关系 | 例句 |
|---|---|---|---|
| who is doing | doing | 主动 / 进行 | the boy standing there |
| which was done | done | 被动 / 完成 | the book written by him |
| who will do / that should be done | to do | 将来 / 目的 / 待完成 | homework to do |
5. 非谓语和状语从句的关系
非谓语也经常由状语从句简化而来。
状语从句表示:
时间、原因、条件、让步、结果、伴随等
而分词短语也可以表示这些关系。
5.1 现在分词 doing ≈ 主动的状语从句
表时间
从句形式:
When I was walking down the street, I saw an old friend.
当我走在街上时,我看见了一个老朋友。
非谓语形式:
Walking down the street, I saw an old friend.
这里:
walking 的逻辑主语是 I
因为:
I was walking down the street.
所以可以简化。
表原因
从句形式:
Because he felt tired, he went to bed early.
因为他感到累,他早早睡觉了。
非谓语形式:
Feeling tired, he went to bed early.
这里:
feeling 的逻辑主语是 he
因为:
he felt tired
所以用 doing。
表伴随
He sat on the sofa, watching TV.
他坐在沙发上看电视。
可以理解为:
He sat on the sofa and watched TV.
这里不是严格的状语从句简化,而是表示两个动作同时存在:
坐着 + 看电视
表自然结果
The fire spread quickly, destroying many houses.
大火迅速蔓延,烧毁了许多房屋。
可以理解为:
The fire spread quickly, and as a result, it destroyed many houses.
这里 destroying many houses 表示自然而然造成的结果。
5.2 过去分词 done ≈ 被动的状语从句
表原因
从句形式:
Because she was moved by the story, she cried.
因为她被这个故事感动了,她哭了。
非谓语形式:
Moved by the story, she cried.
这里:
she was moved by the story
she 和 move 是被动关系,所以用 moved。
表时间
从句形式:
When it is seen from the top of the mountain, the city looks beautiful.
当这座城市从山顶被看时,它很美。
非谓语形式:
Seen from the top of the mountain, the city looks beautiful.
这里:
the city is seen from the top of the mountain
city 和 see 是被动关系,所以用 seen。
更自然的中文是:
从山顶看,这座城市很美。
表条件
从句形式:
If we are given more time, we can finish the work.
如果给我们更多时间,我们能完成工作。
非谓语形式:
Given more time, we can finish the work.
这里:
we are given more time
we 和 give 是被动关系,所以用 given。
5.3 不定式 to do ≈ 目的状语从句
不定式做状语时,最常见的是表示目的。
从句形式:
He got up early so that he could catch the first train.
他早起是为了赶上第一班车。
非谓语形式:
He got up early to catch the first train.
这里:
to catch the first train
= in order to catch the first train
表示目的。
再看:
I study hard so that I can pass the exam.
可以改成:
I study hard to pass the exam.
5.4 状语从句简化成非谓语的条件
不是所有状语从句都能随便简化。
通常需要满足一个重要条件:
从句主语和主句主语一致。
例如:
When I was walking home, I saw a cat.
两个主语都是 I,所以可以简化:
Walking home, I saw a cat.
但是:
When I was walking home, a cat followed me.
从句主语是 I,主句主语是 a cat。
二者不一致,不能直接改成:
Walking home, a cat followed me.
因为这句话会变成:
一只猫在走回家的时候跟着我。
这就是逻辑主语错误。
正确表达是:
When I was walking home, a cat followed me.
或者使用独立主格:
I walking home, a cat followed me.
不过这个句子不太自然。更自然还是保留从句。
6. 非谓语和名词性从句的关系
非谓语和名词性从句也有关系,尤其是不定式和动名词。
名词性从句整体可以做:
主语、宾语、表语、同位语
而不定式和动名词也可以做这些成分。
6.1 动名词 doing ≈ 把一个动作当成名词
名词性从句形式
That he studies English every day is important.
他每天学英语这件事很重要。
这个句子虽然语法上可以,但比较笨重。
更自然可以说:
Studying English every day is important.
每天学英语很重要。
这里:
studying English every day
整体做主语,相当于一个名词性成分。
6.2 不定式 to do ≈ 具体目标或任务
To learn English well takes time.
学好英语需要时间。
也可以用形式主语:
It takes time to learn English well.
这里:
to learn English well
相当于一个名词性成分。
6.3 疑问词 + to do ≈ 简化的名词性从句
这是非常重要的一类。
宾语从句形式
I don’t know what I should do.
我不知道我应该做什么。
非谓语形式
I don’t know what to do.
我不知道该做什么。
这里:
what to do
= what I should do
再看:
She asked where she should go.
可以改成:
She asked where to go.
她问该去哪里。
We haven’t decided when we should start.
可以改成:
We haven’t decided when to start.
我们还没决定什么时候开始。
6.4 疑问词 + to do 的使用条件
通常要求:
主句主语和从句中“应该做事的人”一致,或者语境中清楚是谁做。
例如:
I don’t know what to do.
意思是:
I don’t know what I should do.
做事的人是 I。
Can you tell me how to use this app?
意思是:
Can you tell me how I can use this app?
做事的人通常是 I 或泛指的人。
但是如果主语不同,就不能随便简化。
例如:
I don’t know what he should do.
不能直接改成:
I don’t know what to do.
因为:
what to do
通常理解为:
我不知道我该做什么
而不是:
我不知道他该做什么
如果要表达“他该做什么”,要保留:
I don’t know what he should do.
7. 非谓语和三大从句的总体关系
可以这样总结:
| 从句类型 | 非谓语对应形式 | 典型作用 |
|---|---|---|
| 定语从句 | doing / done / to do | 修饰名词 |
| 状语从句 | doing / done / to do | 表时间、原因、条件、目的、结果、伴随 |
| 名词性从句 | doing / to do / 疑问词 + to do | 做主语、宾语、表语等 |
8. 为什么非谓语可以让句子更高级?
因为它能让句子更简洁、更书面、更紧凑。
用从句
The students who were praised by the teacher felt happy.
用非谓语
The students praised by the teacher felt happy.
后者更简洁。
再看:
用从句
Because he didn’t know what to say, he kept silent.
用非谓语
Not knowing what to say, he kept silent.
后者更紧凑,也更书面。
再看:
用从句
He got up early so that he could catch the train.
用非谓语
He got up early to catch the train.
后者更自然。
9. 从句变非谓语的核心步骤
你可以按这几个步骤操作。
第一步:判断从句类型
先判断它是:
定语从句、状语从句,还是名词性从句
例如:
The boy who is standing there is my brother.
这是定语从句。
第二步:找逻辑主语
看从句动作是谁发出的,或者是谁承受的。
who is standing there
逻辑主语是:
the boy
第三步:判断主动还是被动
如果逻辑主语主动做动作,用 doing:
the boy is standing
→ standing
如果逻辑主语承受动作,用 done:
the book was written
→ written
如果表示目的、将来、任务,用 to do:
homework that I need to do
→ homework to do
第四步:删除重复部分
例如:
The boy who is standing there is my brother.
删除:
who is
留下:
standing there
得到:
The boy standing there is my brother.
10. 定语从句变非谓语:详细规则
10.1 主动进行:who / which + be + doing → doing
The girl who is reading a book is my sister.
变成:
The girl reading a book is my sister.
The people who are waiting outside look tired.
变成:
The people waiting outside look tired.
10.2 被动:who / which + be + done → done
The letter which was written in English is hard to understand.
变成:
The letter written in English is hard to understand.
The problems that were discussed yesterday are important.
变成:
The problems discussed yesterday are important.
10.3 表示将来或任务:that / who will do → to do
The next train that will arrive is from Tokyo.
可以说:
The next train to arrive is from Tokyo.
I need someone who can help me.
可以说:
I need someone to help me.
There are many things that we should discuss.
可以说:
There are many things to discuss.
11. 状语从句变非谓语:详细规则
11.1 主动关系:状语从句 → doing
时间
When he saw me, he smiled.
如果两个主语一致:
Seeing me, he smiled.
看到我,他笑了。
这里:
he saw me
he 主动 see,所以用 seeing。
原因
Because he knew the truth, he stayed silent.
变成:
Knowing the truth, he stayed silent.
因为知道真相,他保持沉默。
11.2 被动关系:状语从句 → done
原因
Because he was shocked by the news, he said nothing.
变成:
Shocked by the news, he said nothing.
因为被这个消息震惊,他什么也没说。
条件
If the medicine is taken correctly, it will be effective.
变成:
Taken correctly, the medicine will be effective.
如果正确服用,这种药会有效。
这里:
medicine is taken
药是被服用,所以用 taken。
11.3 目的:so that / in order that → to do
He works hard so that he can support his family.
变成:
He works hard to support his family.
他努力工作以养家。
She moved to Tokyo in order that she could study Japanese.
变成:
She moved to Tokyo to study Japanese.
她搬到东京是为了学日语。
12. 名词性从句变非谓语:详细规则
12.1 主语从句 → 动名词 / 不定式
That we learn grammar is important.
更自然:
Learning grammar is important.
或者:
It is important to learn grammar.
12.2 宾语从句 → 疑问词 + to do
I don’t know what I should say.
变成:
I don’t know what to say.
We haven’t decided where we should meet.
变成:
We haven’t decided where to meet.
She asked how she could solve the problem.
变成:
She asked how to solve the problem.
12.3 不是所有 that 从句都能变非谓语
例如:
I know that he is honest.
不能简单改成:
I know to be honest.
因为意思完全变了。
that 从句表示一件事实,通常不能随意压缩成非谓语。
但是如果含有“应该、能够、要做什么”这种意义,常可以变成:
疑问词 + to do
例如:
I don’t know what I should do.
→ I don’t know what to do.
13. 非谓语和从句的选择:什么时候用哪个?
13.1 用从句更清楚的时候
如果主语不同,或者逻辑关系复杂,用从句更安全。
例如:
When I was walking home, a cat followed me.
这里从句主语是 I,主句主语是 a cat。
如果改成:
Walking home, a cat followed me.
就会变成:
猫在走回家的时候跟着我。
所以必须保留从句。
13.2 用非谓语更简洁的时候
如果主语一致,逻辑关系清楚,用非谓语更自然。
Because he was tired, he went to bed early.
可以改成:
Tired, he went to bed early.
或者:
Feeling tired, he went to bed early.
13.3 口语中从句更常见,写作中非谓语更常见
口语里,人们常用更直白的从句:
When I got home, I called him.
写作里,可以适当用非谓语:
Arriving home, I called him.
不过注意:非谓语用太多会显得生硬。
学习阶段建议先保证逻辑正确,再追求简洁。
14. 非谓语和从句最容易混淆的地方
14.1 doing 和定语从句
The boy standing there is my brother.
不要误以为这是完整句子。
它其实相当于:
The boy who is standing there is my brother.
其中:
standing there
只是修饰 the boy 的非谓语短语。
14.2 done 和被动定语从句
The book written by him is famous.
相当于:
The book which was written by him is famous.
这里 written 不是谓语。
真正的谓语是:
is
14.3 分词状语的逻辑主语
错误:
Walking down the street, a wallet was found.
这个句子的问题是:
walking 的逻辑主语变成了 a wallet
也就是说,句子字面上好像是:
钱包走在街上。
正确:
Walking down the street, I found a wallet.
或者:
When I was walking down the street, I found a wallet.
14.4 不是所有从句都要变成非谓语
例如:
I think that he is right.
这句话非常自然。
没有必要改成非谓语。
很多时候,非谓语不是“必须”,而是“可以”。
15. 从句和非谓语的本质区别总结
| 项目 | 从句 | 非谓语 |
|---|---|---|
| 是否有完整主谓 | 有 | 没有真正谓语 |
| 是否有明确主语 | 通常有 | 通常依靠逻辑主语 |
| 表达方式 | 完整、清楚 | 简洁、紧凑 |
| 常见场景 | 口语、解释复杂关系 | 写作、压缩信息 |
| 风险 | 句子较长 | 逻辑主语容易错 |
16. 最核心的判断口诀
口诀 1:能不能变非谓语,先看主语
从句主语和主句主语一致,才容易简化成非谓语。
例如:
When I arrived, I called him.
→ Arriving, I called him.
但:
When I arrived, he called me.
不能改成:
Arriving, he called me.
因为这样会变成:
他到达时,他给我打电话。
口诀 2:主动 doing,被动 done,目的 to do
主动 / 进行 → doing
被动 / 完成 → done
目的 / 将来 / 待完成 → to do
例如:
the girl standing there
主动站着
the book written by him
被他写
homework to do
要做的作业
口诀 3:非谓语是“压缩版从句”
who is standing → standing
which was written → written
so that he could pass → to pass
what he should do → what to do
17. 最终总结
非谓语动词和从句的关系可以概括为:
很多非谓语结构,本质上是从句的简化形式。
具体来说:
| 从句 | 可简化为 | 例子 |
|---|---|---|
| 定语从句 | 分词 / 不定式 | the boy who is standing there → the boy standing there |
| 被动定语从句 | 过去分词 | the book which was written by him → the book written by him |
| 状语从句 | 分词短语 | Because he felt tired → Feeling tired |
| 目的状语从句 | 不定式 | so that he could pass → to pass |
| 部分名词性从句 | 疑问词 + to do | what I should do → what to do |
最重要的是:
非谓语没有真正的谓语,它依赖逻辑主语。
从句更完整,非谓语更简洁。
能不能用非谓语,关键看逻辑主语是否清楚,主动被动关系是否正确。