Dear Abbes Z,
If the Teacher was standing next to one Student, in the body of the Class, and the Teacher īs space at the front of the Class was vacant, then your request: "May I go ... " would be acceptable, because that one Student would go away from the Teacher, towards the front of the Class.
However, Naty uses the expression "for students to ask for permission to come to the front".
It is not possible for the Teacher to stand in the body of the Class, adjacent to all Students, simultaneously. Consequently, the requirements for my first paragraph don īt exist.
Moreover, Naty uses the verb īto come � and not īto go �. The examples which she herself gives, confirm that she is thinking in terms of the verb īto come �. I suggest that Naty is mentally imagining herself to be in her customary place, at the front of the Class, and that the chosen Student will come towards her.
If I telephone my friend to ask if I may visit him, I say: "May I come to visit you, please?" not "May I go to visit you, please?" I am imagining myself entering his house. I am not imagining myself leaving my house.
Similarly, the Student imagines entering the Teacher īs space and, therefore, uses the verb īto come �
Les