Her brother went to school. Общий: Did her brother go to school? Альтернативный: Did her brother go to school or to the park? Специальный: Where did her brother go? Разделительный: Her brother went to school, didn't he? Вопрос к подлежащему: Who went to school?
Did her brother go to school? - общий Did her brother go to school or to the university? - альтернативный Who went to school? - к подлежащему Where did her brother go? - специальный Her brother went to school, didn't he? - разделительный