1.make the sentences plural. this is a cat. that is a box this is an orange. that is a cup. this is a hat. that is a tree. this is a lamp. that is a horse. 2.make the sentences singular. these are houses. those are pupils. these are buses. those are tables. these are watches. those are lions. these are hammers. those are cars.

These are cats.
Those are boxes
These are oranges.
Those are cups.
These are hats.
Those are trees.
These are lamps.
Those are horses.
This is a house.
That is a pupil.
That is a bus.
That is a table.
That is a watch.
That is a lion.
This is a hammer.
That is a car.