where do you come from? where does you come from? where do you from?

where does you from?
where are you from?
where are you from?
where are you come from?
where do they come from?
哪几句是错的 ，错在哪里，为什么有时用do有时用 does有时用are ,跪求 高手指教？

do和does是助动词，要用来修饰动词的，where do they come from?这个就对（因为后面是动词come， does用于第三人称单数作主语的句子，而do用于其它主语 表现在时）
are是系动词，后面可接名词、形容词、介词等作表语，这里where are you from?是对的
错误的句子是where does you from?和where are you come from?

先不说你哪个错，告诉你方法，自己实践 I用am ，do you，we，they用are， do he，she，it用is，does 这是现在时的

where does you from?where are you come from?错误 be from 、come from 都是“从。。。来，来自。。。”的意思 构成疑问句的时候，be (is ,are,am) from 把被be 动词提前， I am from Hunan.变成疑问句。 Where are you from? 构成疑问句的时候 come from句中要增加助动词do,does, did. 例如：They come from Hunan. Where do they come from?

当然啦，平时呢，be form=come form=来自。。。 可以变为疑问句时， 例如，你来自来里？ where do u come from? where are u from? 因为疑问句的时候，要将be动词，情态动词，系动词，要前放， 没有这些动词，只能借助动词do ,does,did,