Did Bob read books last month? общий
What did Bob read last month? специальный
Did Bob read books last week or last month?aльтернативный
Bob read books last month, didn't he? разделительный
Who read books last month? вопрос к подлежащему
Did Bob read books last month? общий
What did Bob read last month? специальный
Did Bob read books last week or last month?aльтернативный
Bob read books last month, didn't he? разделительный
Who read books last month? вопрос к подлежащему