- Review: verbs to be, there to be, to have–

Affirmative: All things in the world ARE different forms of one and the same thing – what scientists call matter.

Negative: All things in the world ARE NOT different forms of one and the same thing.

Interrogative: ARE all things in the world different forms of one and the same thing ?

• IT IS time to work.
• IT IS hot today.
• IT IS very difficult to drive a car along them.

Present: The Alaskan brown bear IS the largest.

Past: The Alaskan brown bear WAS the largest.

? : WAS the Alaskan brown bear the largest?

THERE TO BE X TO HAVE

"Haver, existir X posse"

Affirmative: There are two sciences that deal especially with these bases: chemestry and physics.

Past: There WERE two sciences that deal especially with these bases: chemestry and physics.

Interrogative: Are there two sciences that deal especially with these bases?