Поставьте предложения в Past Indefinite и сделайте вопросительную и отрицательную формы.
a) They (to leave) their friends in the forest.
b) The teacher (to give) the homework.
c) Mary (to have) many friends.

a) They left their friends in the forest. They didn’t leave their friends in the forest. Did they leave their friends in the forest?
b) The teacher gave the homework. The teacher didn’t give the homework. Did the teacher gave the homework?
c) Mary had many friends. Mary didn’t have many friends. Did Mary have many friends?