Задать общий вопрос (простой и с отрицанием)

Альтернативный

Специальный к подлежащему (простой и с отрицанием)

Разделительные вопросы

The crew members are thinking about their Christmas holidays.

Общие:

Are the crew members thinking about their Christmas holidays?

Aren't the crew members thinking about their Christmas holidays?

Альтернативный:

Are the crew members thinking or planning their Christmas holidays?

К подлежащему:

Who is thinking about the Christmas holidays?

Who isn't thinking about the Christmas holidays?

Разделительные:

The crew members are thinking about their Christmas holidays, aren't they?

The crew members aren't thinking about their Christmas holidays, are they?