When considering the phrases “Where you come from” and “Where do you come from?” the correct choice depends on the context. Grammatically, “Where do you come from?” is a complete interrogative sentence, used to ask someone about their place of origin. The structure includes an auxiliary verb (“do”), making it grammatically accurate for questions.
On the other hand, “Where you come from” is a clause, not a complete sentence. It often functions as part of a larger sentence, such as “I know where you come from,” or can appear informally in casual speech but remains grammatically incomplete on its own.
For clarity and proper usage, always choose “Where do you come from?” when directly asking a question.