Нужно сделать эти предложения отрицательными: 1,Archaeologists look for old things buried

Необходимо сделать эти предложения отрицательными: 1,Archaeologists look for old things buried in the ground and use them to tell us about the pst 2.They find wooden buildings deep under the streets of modern York 3.Ancient York was rich and famous in the 11th century 4.When Vikings die their relatives used to bury their dead with treasure of gold and silver 5.Archaeologist find lots of treasures in Viking graves 6.There was a skeleton of rich man in one of the graves 7.Vikings came from Skandinavia and settled in the North of Britain