Last summer my friends and I travelled about Italy.
Last summer my friends and I didn't travel about Italy. Отрицательное предложение
Did my friends and I travel about Italy last summer? Общий
Did my friends and I travel about Italy or London last summer? Альтернативный
Who travelled about Italy last summer? Вопрос к подлежащему
When did my friends and I travel about Italy? Специальный