1. Infinitive Phrases
An INFINITIVE is a form of a verb that usually appears with the word TO and acts as a noun, an adjective, or an adverb. For example: to sing, to dance, to play, to run.

2. Infinitives as an Adjective
The children showed a willingness to cooperate.
to cooperate is an adjective modifying willingness

3. Infinitive as an adverb
During the war, the French people struggled to resist.
to resist modifies struggled

4. Infinitive as a Subject
To understand requires maturity and acceptance.

5. Infinitive as a Direct Object
The peasants of France decided to rebel.

6. Infinitive as an Appositive
You have only one choice, to stay.