Animal farm is a book about how the animals all get along when odd things start happening in the farm. The theme of animal farm is the idea of tyranny and how it would work in the farm. When the old pig has a dream about living free without people controlling them, he decides to turn this into a reality.
The infinitive is a grammar term that refers to a basic verb form that often acts as a noun and is often preceded by the word "to.". "To sing" is an example of an infinitive
