Помогите!!!!!!!!!!!!!!! надо зделать отрицательную форму и вопросительную от придложен?

Помогите!!!!!!!!!!!!!!! надо зделать отрицательную форму и вопросительную от придложен??я: The children have come to a beatiful place. Dan and Alex have already put up a few tents. Some boys have collected the wood. Tom has made a fire. Sue has brought some water from the stream. Ann and Jane have already begun to cook a meal.P.S. ето Past simple