“Has” questions are a type of grammatical construction in the English language known as the present perfect tense, that are used to ask about something that has happened or been completed in the past and it is related to the present. They are formed by using the present perfect form of the main verb, which is “has” + the past participle form of the main verb. For example: “Has he finished his homework?”, “Has she seen the movie?”, “Has it stopped raining?” These questions are asking about something that has happened or been completed in the past and it is related to the present. The answer to these questions can be a statement in the present perfect form, indicating that the action has been completed.