The document discusses using habits in the past and present tense. It provides examples of how to use "used to" and "be/get used to" with different subjects and tenses. Examples include "Maher used to swim in the canal" and "Maher is used to swimming now." It also discusses using objects like pencils, explaining for example "A pencil is used to draw lines." and "Pencils were used for writing." The document provides tests and questions to check understanding of using these phrases in different situations.