1. Infinitives A verb form that can be used as a noun, an adjective, or an adverb. Most infinitives begin with to

2. Examples Noun: To graduate is a student's primary goal. Adjective: Mr Tanger would be the one to ask. Adverb: The guests stood to leave.

3. Present perfect form In addition to the previous structure, infinitives have a present perfect form Example: To have solved the problem would have made the research worthwhile The original goal was to have been finished with the project by noon.

4. The Infinitive Phrase An infinitive phrase consists of an infinitive and its modifiers and complements. The entire phrase can be used as a noun, an adjective or an adverb

5. Examples Noun: Bruce's dream is to travel to Africa Adjective: Have you had the chance to sample this authentic tortilla soup? Adverb: Are you ready to give Charles his instructions?