This document discusses the use of "used to" and "be/get used to" in the English language. It explains that "used to" is used with the infinitive form of a verb to talk about past habits or actions that no longer happen. It also explains that "be used to" refers to being accustomed to something, while "get used to" means becoming accustomed to something over time. Examples are provided for the different uses of "used to", "be used to", and "get used to".