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1、陈述句变一般疑问句的方法用yes或no来回答的疑问句，一般疑问句用升调。陈述句变为疑问句时分三种情况：1.陈述句中有系动词be、助动词be, do, will, would, shall, should, 或情态动词can, could, may, , must,时，将这些系动词、助动词或情态动词移到句首，并在句末加上问号。如：Ill go to the History Museum this afternoon.Will you go to the History Museum this afternoon?今天下午你去了历史博物馆吗？I visited Beijing last month
2、.Did you visit Beijing last month? 上个月你参观了北京吗？在对用may所提问题的否定回答时，一般用mustnt / cant；而在对用 must所提的问题进行否定回答时，一般用neednt / dont have to. 如：May I use your bike now? Yes, you may. / No, you cant. (mustnt)Must I stay at school this afternoon? Yes, you must. / No, you neednt (dont have to).2.原陈述中没有系动词be、助动词be, d
3、o, will, would, shall, should had或情态动词can, could, may, must, 时，则在句首加助动词Do的适当形式，同时，将谓语动词变为原形动词。如：We speak Chinese.Do you speak Chinese? 你讲汉语吗？I went shopping yesterday.Did you go shopping yesterday? 昨天你去买东西了吗？3.原陈述句中，若谓语动词是have / has, 则须考虑have / has的意义。如果have / has是“有”的意义时，变为疑问句时，既可在句首加Do的适当形式，也可将have / has,提到句首。如：He has a beautiful pen.Has he a beautiful pen? / does he have a beautiful pen? 他有一只漂亮的钢笔吗？但若have / has,的意思不是“有”时，变为疑问句时，则必须在句首加Do的适当形式。如I have lunch at home.Do you have lunch at home? 你在家吃中饭吗？We had a meeting last night.Did you have a meeting last night?昨天晚上你开会了吗？