We usually have three classes a day,don’t we? Разделительный
Do we (you) usually have three classes a day? Общий
Who usually has three classes a day? Вопрос к подлежащему
How often do we( you) have three classes a day? Специальный
Do we( you) have three or four classes a day? Альтернативный
We usually have three classes a day,don’t we? Разделительный
Do we (you) usually have three classes a day? Общий
Who usually has three classes a day? Вопрос к подлежащему
How often do we( you) have three classes a day? Специальный
Do we( you) have three or four classes a day? Альтернативный