The document discusses the simple present continuous tense, simple past continuous tense, and simple future continuous tense in English. It provides the structure and uses of each tense. The present continuous tense is used to talk about actions happening now or in the future. The past continuous tense expresses actions happening at a particular moment in the past or to show two simultaneous actions, one long and one short. The future continuous tense expresses actions that will be happening at a particular moment in the future and will have started but not finished by that time. Examples are given for how to form and use each tense.