The document discusses the different uses of the present simple tense. It is used to describe facts that are always or generally true, such as there being 8 planets in the Solar System. The present simple is also used for habits or routines like having lunch every day. It can describe more permanent situations, for example one's mother working at a school or where someone lives or studies. Feelings and thoughts are also expressed using the present simple, such as loving One Direction or liking basketball.