Was Shirley preparing to leave her friend Caroline for the night? Общий
Who was preparing to leave her friend Caroline for the night? Вопрос к подлежащему
Was Shirley preparing to leave her friend Caroline or Helen for the night? Альтернативный
When was Shirley preparing to leave her friend Caroline? Специальный
Shirley was preparing to leave her friend Caroline for the night,wasn't she ? Разделительный