Question

написать предложения в прошедшем и будущем времени

There is a map on the wall.

There are three rooms in our flat.

There is little milk in the bottle.

There are maps on the wall.

There is one room in our  flat.

There are many books in the bag.

 

Answer 1

is = was = will be
are = were = will be

Answer 2

There was a map on the wall.There were three rooms in our flat.There was little(я бы не употребил это слово) milk in the bottle.There were maps on the wall.There was one room in our flat.
There were many books in the bag.