Grammar Rule in 30 Seconds
A split infinitive occurs when you place an adverb between the particle 'to' and the base verb for emphasis or clarity.
- Standard: 'to' + 'verb' (to go). Split: 'to' + 'adverb' + 'verb' (to boldly go).
- Use it to avoid ambiguity: 'to quickly leave' is clearer than 'quickly to leave'.
- Modern style allows it, but some formal academic circles still prefer avoiding it.
Overview
to + verb。这给了我们一个美丽的空白去填充。To boldly go where no man has gone before。这句话是对旧派语法老师最彻底的反击。当你在 to 和 verb 之间放一个副词（adverb）时，就发生了拆分不定式。几十年来，人们认为这是一个错误。他们希望你说 To go boldly。但 To go boldly 听起来像维多利亚时代的诗。To boldly go 听起来像一个使命。在 C2 级别，你不仅仅是在学习规则。你是在学习如何有格调地打破规则。你用它来给你的句子增加风味。它能让你听起来更自然、更有节奏感。如果你从不拆分不定式，你听起来可能像个机器人，或者像一本非常无聊的教科书。我们不想要那样；我们要你的英语有灵魂。How This Grammar Works
to finish。你想强调你是*如何*完成的。拿一个副词，比如 finally。把它直接扔在中间。现在你有了 to finally finish。这不仅仅是为了叛逆，而是为了把强调放在它该放的地方。通常，副词修饰紧随其后的动词。通过把它放在不定式内部，你创造了一种紧密的联系。意义变得有力而清晰。把它想象成一个三明治。to 和 verb 是面包。副词是美味的馅料。没有馅料，它只是普通的烤面包。没人想在 C2 考试中拿普通的烤面包应付。
Formation Pattern
to 加上动词原形。例如：to understand。
fully。
to 和 verb 之间插入副词。
to + adverb + verb。例如：to fully understand。
When To Use It
I want to personally thank you for the opportunity. 这听起来比 I want to thank you personally要真诚得多。在创意写作中使用它来营造紧张感。当替代方案听起来笨拙或模棱两可时使用它。有时，把副词放在别处会完全改变意思。如果你说
She decided to quickly leave，意思很明确。如果你说
She decided quickly to leave，是她决定得快？还是离开得快？拆分不定式消除了这种神秘感。在社交媒体配文中使用它，让自己看起来很时髦。
Trying to actually live my best life. 这比 Trying to live my best life actually更有力。
Common Mistakes
to 和 verb 之间放一个完整的短语。To as quickly as humanly possible run 是场灾难。控制在一个或两个单词内。另一个错误是“塞入”不必要的副词。如果动词已经暗示了副词的意思，就不要拆分它。To loudly shout 是多余的，你大声叫本来就是大声的。除非你非常明确，否则避免用 not 等否定词进行拆分。To not go 是标准的。To never again see 是一个起作用的戏剧性拆分。但 to not ever go 就显得很乱。不要仅仅为了标新立异而拆分；如果破坏了节奏，那就是个错误。你的目标是平滑、老练的氛围，而不是语法上的车祸。Contrast With Similar Patterns
- 未拆分：
He prepared to enter silently.
（重点在进入）。 - 拆分：
He prepared
（重点在静悄悄）。to silently enter.
He silently prepared to enter.这里的“静静地”是指*准备*过程，而不一定是进入动作。位置决定一切。在 C2 英语中，这些微小的转变就是你的超能力。你不仅仅是在传输数据，你是在用文字画画。使用拆分来把镜头聚焦在你想要的地方。
Quick FAQ
To slowly and carefully walk 是可以的。再多就乱了。To boldly go。太空：语法的最后疆界。Infinitive Placement Comparison
| Type | Structure | Example | Effect |
|---|---|---|---|
|
Standard
|
to + verb + adverb
|
To go boldly
|
Neutral/Traditional
|
|
Split
|
to + adverb + verb
|
To boldly go
|
Emphatic/Rhythmic
|
|
Negative Standard
|
not + to + verb
|
Not to fail
|
Formal/Standard
|
|
Negative Split
|
to + not + verb
|
To not fail
|
Conversational/Strong
|
|
Compound Split
|
to + adv + and + adv + verb
|
To fully and clearly see
|
Highly Descriptive
|
Meanings
The practice of placing a word or phrase (usually an adverb) between 'to' and the bare infinitive form of a verb.
Emphasis
Using the split to draw specific attention to the manner of the action.
“I want you to really think about this.”
“She needs to actually try for once.”
Clarity/Ambiguity Avoidance
Splitting the infinitive to ensure the adverb modifies the correct verb in a complex sentence.
“He agreed to immediately help us (He will help now).”
“He agreed immediately to help us (The agreement happened now).”
Negative Splitting
Placing 'not' between 'to' and the verb for stylistic weight.
“The challenge is to not fail.”
“I was told to not worry.”
Reference Table
| 结构 | 示例 | 效果/细微差别 | 何时使用 |
|---|---|---|---|
|
分裂不定式 (Split Infinitive)
|
`to boldly go`
|
强调副词，直接修饰动词
|
为了清晰、强调和自然流畅
|
|
不分裂 (副词在前)
|
`boldly to go`
|
通常很生硬，现代英语少见
|
极少使用，单个副词几乎不这么放
|
|
不分裂 (副词在后)
|
`to go boldly`
|
强调减弱，有时会产生歧义
|
不想太强调副词，或针对特定副词时
|
|
多个副词
|
`to very quickly understand`
|
用多个修饰语保持清晰
|
需要精准表达且位置讲究时
|
|
副词短语
|
`to with great skill perform`
|
描述性强，但容易显得笨重
|
谨慎使用以达到特殊效果，注意语流
|
|
否定副词
|
`to never yield`
|
强烈的否定，意图清晰
|
表达绝对拒绝或完全没有时
|
正式程度
To understand the situation fully (General comprehension)
To fully understand the situation (General comprehension)
To really get what's going on (General comprehension)
To lowkey get the vibe (General comprehension)
分裂不定式宇宙
好处
- 强调 Focus on adverb
- 清晰 Avoid ambiguity
- 流畅 Natural sound
常见例子
- to boldly go Star Trek classic
- to quickly run Speed of action
- to always remember Continuous action
副词类型
- -ly 副词 quickly, fully
- 短副词 just, never
- 副词短语 with precision
何时避免
- 过度分裂 Too many words
- 读音别扭 Sounds bad
- 正式语境 Traditional readers
分裂与不分裂不定式：细微差别与影响
我应该分裂这个不定式吗？
它能提高清晰度或增强语气吗？
大声读出来自然吗？
夹在中间的词是不是太多了？
你的读者是极其传统的语法学家吗？
常用于分裂不定式的副词
强调
- • truly
- • really
- • completely
- • fully
- • totally
方式
- • quickly
- • gently
- • carefully
- • boldly
- • efficiently
频率/时间
- • always
- • never
- • often
- • soon
- • just
- • finally
程度
- • further
- • greatly
- • radically
- • barely
按水平分级的例句
I want to really help you.
I want to really help you.
Try to slowly speak.
Try to slowly speak.
He needs to quickly run.
He needs to quickly run.
I like to always win.
I like to always win.
You need to carefully open the box.
You need to carefully open the box.
She decided to never go back.
She decided to never go back.
We hope to soon see you.
We hope to soon see you.
It is hard to perfectly cook rice.
It is hard to perfectly cook rice.
The manager asked us to seriously consider the offer.
The manager asked us to seriously consider the offer.
I was told to not touch the buttons.
I was told to not touch the buttons.
They want to significantly improve the software.
They want to significantly improve the software.
He tried to quietly enter the room.
He tried to quietly enter the room.
The government plans to further investigate the matter.
The government plans to further investigate the matter.
It is essential to properly maintain your vehicle.
It is essential to properly maintain your vehicle.
She was able to successfully complete the marathon.
She was able to successfully complete the marathon.
We need to effectively communicate our goals.
We need to effectively communicate our goals.
The witness was asked to truthfully and accurately recount the events.
The witness was asked to truthfully and accurately recount the events.
The author tends to deliberately obscure the protagonist's motives.
The author tends to deliberately obscure the protagonist's motives.
The company sought to aggressively expand its market share.
The company sought to aggressively expand its market share.
It is a mistake to simply assume that the data is correct.
It is a mistake to simply assume that the data is correct.
The diplomat's task was to subtly yet firmly convey the administration's displeasure.
The diplomat's task was to subtly yet firmly convey the administration's displeasure.
To truly understand the poem, one must look beyond the literal meaning.
To truly understand the poem, one must look beyond the literal meaning.
The board decided to irrevocably and unconditionally terminate the contract.
The board decided to irrevocably and unconditionally terminate the contract.
He was determined to not only survive but to actually thrive in the new environment.
He was determined to not only survive but to actually thrive in the new environment.
容易混淆
Learners often place adverbs in positions where they could modify the preceding or following verb.
常见错误
I want to really to go.
I want to really go.
To go really.
To really go.
He decided to not to eat.
He decided to not eat.
I hope to quickly and without any trouble finish.
I hope to finish quickly and without any trouble.
He failed to completely and utterly and without reservation apologize.
He failed to apologize completely, utterly, and without reservation.
句型
It is important to ___ ___.
The goal is to ___ and ___ ___.
Real World Usage
I hope to significantly contribute to your team.
I need to literally go right now.
The study aims to better understand the underlying causes.
The parties agree to mutually terminate the agreement.
I'm about to finally post the vlog!
Be sure to thoroughly whisk the eggs.
优先考虑清晰度与流畅感
I want you to carefully read this document.
避免过度分裂
Try to immediately call her.（而不是塞一长串短语）。
相信你的语感
看场合下菜碟
He decided to formally resign.
Smart Tips
Try splitting the infinitive to see if it adds more 'punch' to your sentence.
Switch to 'to not' for a more modern, conversational feel.
Split the infinitive to ensure the adverb only modifies the action verb.
Do NOT split. Move the long phrase to the end of the sentence.
发音
Stress the Adverb
When splitting an infinitive, the stress usually falls on the adverb to highlight the manner of the action.
Rising-Falling
to BOLDly go
Conveys confidence and emphasis.
记住它
记忆技巧
Remember 'Star Trek': To BOLDLY go. If Captain Kirk can do it, you can too!
视觉联想
Imagine a giant wedge (the adverb) being driven between the words 'to' and 'verb'. The wedge makes the whole structure stronger and more visible.
Rhyme
When 'to' and 'verb' are split apart, the adverb speaks from the heart.
Story
A grammarian in 1860 tried to glue 'to' and 'run' together with Latin glue. But the English language was too strong; it popped an 'adverb' right in the middle to show everyone how it's done.
Word Web
挑战
Write three sentences about your career goals using split infinitives (e.g., 'I want to significantly increase...').
文化笔记
Americans are generally very comfortable with split infinitives, especially in media and business.
Some older British style guides (and older generations) may still view it as a sign of 'lazy' writing, though this is changing rapidly.
The phrase 'To boldly go' from Star Trek is the most famous split infinitive in history and is often used to defend the construction.
The 'rule' against split infinitives was popularized by Henry Alford in 1864, who based it on Latin grammar.
对话开场白
What is one thing you want to completely change about your routine?
In your opinion, is it better to slowly build a career or to quickly reach the top?
日记主题
常见错误
Test Yourself
The manager asked her ___ complete the urgent task.
quickly 放在 'to' 和 'complete' 之间，能立刻强调任务所需的速度，是最自然、最有力的选择。Find and fix the mistake:
We aim to make sure entirely that the data is accurate.
to make sure entirely 听起来很笨重。用 entirely 劈开不定式 (to entirely make sure) 能让语流更顺畅，并清晰地强调检查数据的彻底性。Choose the correct sentence:
at the earliest opportunity 放在 'to' 和 'return' 之间，清晰地修饰了动词，比放在其他地方更自然，也减少了歧义。Score: /3
练习题
8 exercisesThe company needs...
If you want to win, you need ___.
Find and fix the mistake:
He decided quickly to leave the party.
I decided ___.
Splitting an infinitive is a grammatical error in modern English.
Identify the split infinitive:
A: Should I tell him the truth? B: I think you need ___.
It is easy ___.
Score: /8
Practice Bank
12 exercisesIt's important ___ remember your roots.
The company decided ___ restructure its global operations.
I need to ensure thoroughly that all safety protocols are followed.
She resolved to, after much deliberation, resign from her position.
Choose the correct sentence:
Choose the correct sentence:
Translate into English: 'El objetivo es mejorar drásticamente la calidad.'
Translate into English: 'Ella comenzó a estudiar seriamente para sus exámenes.'
Arrange these words into a sentence:
Arrange these words into a sentence:
Match the infinitive phrase beginnings with their appropriate split adverbs.
Match the split infinitive on the left with an equivalent or closest unsplit version on the right.
Score: /12
常见问题 (8)
Only if it makes the sentence confusing or ugly. If you put a 10-word phrase between 'to' and the verb, it's 'wrong' stylistically, but not grammatically.
Many teachers still follow 19th-century rules based on Latin. In Latin, you can't split an infinitive because it's one word. English is different!
Yes, but 'to not' is often more emphatic. 'I chose not to go' is neutral. 'I chose to not go' sounds like a stronger decision.
Yes. Most modern academic journals and style guides (like MLA or Chicago) allow it for the sake of clarity.
It's an adverb that sits between two verbs, making it unclear which one it modifies. Splitting the infinitive solves this by 'locking' the adverb to the second verb.
Yes, e.g., 'to fully and completely understand'. Just don't overdo it, or the sentence will become hard to follow.
You can say 'to clearly be' or 'to be clearly'. Both are common, but 'to clearly be' is the split form.
The Star Trek intro: 'To boldly go where no man has gone before.'
Scaffolded Practice
1
2
3
4
Mastery Progress
Needs Practice
Improving
Strong
Mastered
In Other Languages
Infinitive + Adverb
English infinitives are two words; Spanish are one.
Infinitive + Adverb
French cannot split the verb unit.
Adverb + zu + Infinitive
German puts the adverb before the 'to' equivalent.
Adverb + Verb-form
No particle-verb structure to split.
Masdar (Verbal Noun)
Arabic uses noun-based or clause-based structures.
Adverb + Verb
No 'to' particle exists to be split from the verb.
Learning Path
Prerequisites
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