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.