Вопросительный:

Does he usually have breakfast? Отрицательный:

He doesn't usually have breakfast.

Разделительный:

He usually has breakfastat at 8 o'clock, hasn't he?

He usually has breakfast at 8 o'clock.

Общий вопрос

Does he usually have breakfast at 8 o'clock?

Отрицание

He does not usually have breakfast at 8 o'clock.

Специальный вопрос

When does he usually have breakfast?

Альтернативный вопрос

Does he usually have breakfast or dinner at 8 o'clock?

Вопрос к подлежащему

Who usually has breakfast at 8 o'clock?

Разделительный

He usually has breakfast at 8 o'clock, doesn't he?