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.

They left their friends in the forest
Did they leave their friends in the forest?
They didn`t leave their friends in the forest

The teacher gave the homework
Did the teacher give the homework?
The teacher didn`t give the homework

Mary had many friends
Did Mary have many friends
Mary didn`t have many friends