There are two kinds of questions: yes or no questions and wh- questions. You ask a yes or no question to get yes or no as the answer. Use the verbs be, have or do, or any of the helping verbs, to ask yes or no questions. Can you swim? Yes. Are they coming? No. Is it raining? No. May I come in? Yes. In questions, the helping or auxiliary verbs come before the subject of the sentence. When be and have are used as ordinary verbs, they come before the subjects, too. Wh- questions usually include the verbs be, have, do, or any of the helping verbs. To ask for facts, use the question words what, which, who, whom, how, when, where. The helping verbs in wh- questions usually come before the subject. So does the verb be when it is used as an ordinary verb. Where are you? What is David saying? How did you get up here? Why was the girl crying? Which color do you prefer? Who is she going to invite to her party? Whom is she going to invite to her party? What is your problem? When do the stores open in the morning?

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