College English Grammar: Grammar and Writing By Zhu XiangjunUnit 9 Phrases: Infinitive Phrases Grammar: Infinitive Phrases Writing: Correcting: Double Negatives Rewriting: Important ideas of a sentenceInfinitive Phrases An infinitive is used as a noun, an adjective, or an adverb. Unlike a real verb which functions as a predicate in a sentence, an infinitive is used as a subject, object, attributive, adverbial or complement. (not) to + Verb = infinitive To shop is her greatest love. (as a noun fu