A split infinitive is a grammatical construction in the English language where a word or phrase, usually an adverb or adverbial phrase, occurs between the marker to and the bare infinitive (uninflected) form of the verb. The construction is particularly notable because of some controversy (see below) as to whether it is "grammatically correct". Descriptively speaking, split infinitives are common in most varieties of English. However, their status as part of the standard language is controversial. In the 19th century, some grammatical authorities sought to introduce a prescriptive rule that split infinitives should not be used in English. Find out more...