Present Perfect. Interrogative sentences
videouroki.net › razrabotki › present-perfectAug 06, 2019 · How to Form an Open-Ended Interrogative Sentence Like all complete sentences in English, an interrogative sentence must contain a subject and a verb. However, here the word order is usually changed to put the verb before the subject. For example: When is the deadline? In this sentence, "deadline" is the subject and "is" is the verb.