Understanding split infinitives is one of those grammar topics that many English learners find confusing, yet mastering them can significantly improve how you express emphasis and meaning in professional and everyday communication.
What is an infinitive and how does it get split?
An infinitive is the base form of a verb preceded by the word to: to register, to listen, to type [01:08]. A split infinitive occurs when another word — usually an adverb — is placed between to and the verb [01:22]. For example:
- To not register.
- To carefully listen.
- To quickly type.
Notice how the adverb sits right in the middle, "splitting" the infinitive into two parts. This structure is common in both spoken and written English, and recognizing it helps you make more intentional word choices.
How do split infinitives work in affirmative and negative sentences?
Affirmative split infinitives
In affirmative sentences, an adverb splits the infinitive to modify the verb more closely [01:38].
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Original: "The manager instructed the team to review the report carefully."
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Split infinitive: "The manager instructed the team to carefully review the report."
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Original: "They plan to participate actively in the meeting."
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Split infinitive: "They plan to actively participate in the meeting." [02:04]
Placing the adverb between to and the verb draws attention directly to how the action is performed.
Negative split infinitives
When you use not to split the infinitive, you create extra emphasis on the negation [02:18].
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Standard: "She chose not to attend the conference due to scheduling conflicts."
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Split: "She chose to not attend the conference due to scheduling conflicts."
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Standard: "Our boss told us not to submit the report until next Monday."
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Split: "Our boss told us to not submit the reports until next Monday." [02:48]
The difference is subtle but meaningful. Placing not after to stresses the prohibition more strongly.
Should you use or avoid split infinitives?
Some grammarians and writers recommend avoiding them, but the real answer depends on meaning and clarity [03:26]. Consider these two sentences:
- "She decided quickly to finish her work before the deadline."
- "She decided to quickly finish her work before the deadline."
The first sentence means she made the decision quickly. The second means she decided to complete the work quickly [03:40]. The split infinitive actually changes the meaning, so using it can be the more precise option.
To fix a split infinitive when it is not needed, simply move the adverb to the end of the sentence [03:08]:
- Split: "The team aims to efficiently complete the project."
- Fixed: "The team aims to complete the project efficiently."
Key takeaway: use split infinitives deliberately when they add emphasis or preserve the intended meaning. Avoid them only when they create awkwardness or ambiguity. Practice identifying them in the worksheet provided so you can strengthen this skill and write with greater precision.
