You have an apple,don't you? she is crazy,isn't you? you did the homework,didn't you? he is very good student,isn't it? напишите в каком времени написаны предложения

You have an apple,don't you? - Настоящее простое
She is crazy,isn't you? - Настоящее простое (хотя там ошибка. Почему isn't you? May be, isn't she?)
You did the homework,didn't you? - Простое
He is very good student,isn't it? - настоящее простое, но тут опять ошибка. Isn't he