The document discusses the present continuous and past continuous tenses in English. It provides examples of their use, including their affirmative, negative, and interrogative forms. The present continuous is used to describe actions that are happening now, and takes the form of subject + to be verb + -ing. The past continuous describes actions that were ongoing at some point in the past, and takes the form of subject + to be verb in past tense + -ing. Examples of verbs are provided in the different tenses and forms.