17/06/2026
Split Infinitives in English Grammar: Definition, Rules, & Usage
A split infinitive occurs when a word — almost always an adverb — is placed between “to” and the verb, dividing the two elements that normally sit together:
Structure of a Split Infinitive: to + adverb + verb
Examples:
She promised to always support her friends.
He wanted to fully understand the situation.
We hope to successfully complete the project.
In each example, the adverb splits the infinitive phrase.
In this article, you will learn what split infinitives are, how they work, when to avoid them, and when they are perfectly acceptable.