... is a ball
This is a ball.
... are leaves.
Those are leaves.
... is a cow.
This is a cow.
... are ducks.
These are ducks.
... is a mouse.
That is a mouse.
... are builders.
Those are builders.
... is a house.
This is a house.
... is a pair of socks.
That is a pair of socks.
... is a chicken.
This is a chicken.
... are people.
These are people.
... are clouthes.
Those are clouthes.