Общий: Has a boy bought many sweets?
Специальный: How much sweets has bought a boy?
Альтернативный: Has a boy bought many sweets or biscuits?
Разделительный: A boy has bought many sweets, hasn't he?
Вопрос к подлежащему: Who has bought many sweets?
Общий: Has a boy bought many sweets?
Специальный: How much sweets has bought a boy?
Альтернативный: Has a boy bought many sweets or biscuits?
Разделительный: A boy has bought many sweets, hasn't he?
Вопрос к подлежащему: Who has bought many sweets?