1.There is a book on the table.
Is there a book on the table? (общий)
What is there on the table? (специальный к подлежащему)
Where is a book? (специальный)
There is a book on the table, isn`t there? (разделительный)
2. He must work hard today.
Must he work hard today? (общий)
Who must work hard today? (специальный к подлежащему)
How must he work? (специальный)
When must he work hard? (специальный)
He must work hard today, mustn`t he? (разделительный)
3. We are leaving for Moscow next week.
Are we leaving for Moscow next week? (общий)
Who is leaving for Moscow next week? (специальный к подлежащему)
Where are we leaving for? (специальный)
When are we leaving for Moscow? (специальный)
We are leaving for Moscow next week, aren`t we? (разделительный)
4. We were reading the whole evening.
Were we reading the whole evening? (общий)
Who was reading the whole evening? (специальный к подлежащему)
What were we doing the whole evening? (специальный)
How long were we reading? (специальный)
We were reading the whole evening, weren`t we? (специальный)