رايك ابة؟؟؟؟؟؟؟؟؟؟؟؟؟؟؟؟؟؟؟؟؟؟؟؟؟
 

Is it wrong to say: "When have you come?" Must I say: "When did you come?"
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Generally, yes, it is wrong to say When have you come? I can think of one or two contexts in which a native speaker might use the present perfect here, but 99.9999% of the time you must say When did you come?

When did you come ?
Use :How long