what are infinitives
An infinitive is the base form of the verb that is preceded by 'to' and acts as noun. It is also called as 'Verb-Noun'. Look at the following examples:
I refused to tell a lie.
The girl wanted to watch a movie.
My mother would be happy to see me.
She is asked to address the audience.
To wake up early is a difficult task for her.
I did not intend to hurt.
You have no choice but to surrender.
To respect your nation is your duty.
This is not the time to repent.
I did want him to know about it.