1) Are the students having
exams now? общий
Are the students having exams or tests now? альтернативный
The students are having exams now, aren't they? разделительный
What are the students having? специальный
Who is having exams now? к подлежащему
2) Is Jane playing in the yard
at the moment?
Is Jane playing in the yard or
in the garden at the moment?
Jane is playing in the yard at the moment, isn't she?
Where is Jane playing at the moment?
Who is playing in the yard at the moment?