The document discusses the present perfect continuous tense in English grammar. It explains that the present perfect continuous tense is used to describe an action that began in the past, continues in the present, and may still be ongoing or has recently stopped. It provides examples of forming sentences in the present perfect continuous tense based on various pictures, including "It has been raining" and "They have been travelling." It then prompts turning each example into a yes/no question using the present perfect continuous, such as "Has he been eating?"