告诉你哈 Are是be动词(系动词),也就是说它是一个谓语动词,一般用于主系表结构或者是表示什么人是什么(身份). 当肯定句是以be动词作谓语时该疑问句用Are(am is)开头 例子 I am a student. Am I a student?此处student是名词,意为我是个学生 或者 It is hard to him to win the campaign. Is it hand to him to win the campaign?这是It is adj形容词.结构是It is adj to sb.to do sth.此时it作形式主语无实意.is为系动词,形容词作表语. Do是助动词 不作谓语使用当原句是以实意动词作谓语(譬如:take,eat等等)就要以do开头改疑问句 例子:I want to eat something. Do you want to eat something? 谓语是eat所以用助动词do开头 明白否? 不明白可以给我发信息.