an infinitive or infinitive phrase
An infinitive is a verb form that typically begins with the word to. An infinitive phrase includes the infinitive, plus any modifiers and complements. Infinitives and infinitive phrases can function as nouns, adjectives, or adverbs in a sentence.As nouns, infinitives and infinitive phrases can act either as subjects, direct objects, or predicate nominatives.plit Infinitives. A split infinitive is an infinitive that has a word or words appearing between the to and the verb that follows it. Avoid split infinitives by keeping the to and the verb together. To correct a split infinitive, move words such as modifiers to a different location in the sentence.