¿Cómo se escribe, has o haz?
haz if the 2nd person, informal, singular, affirmative command (imperative mood) form of the verb hacer.
Haz: Imperative form of verb Hacer (do) ej; Haz tu tarea (Do your homework) Has: Is from the auxiliar verb Haber (Have been) ej; Has estado enfermo? ( Have you been sick?) Conclusion: Haz and Has are forms of two different verbs Hacer and Haber