This document discusses definite and indefinite articles in English. It provides examples of using "a/an" versus "one" when referring to singular countable nouns like bicycle and elephant. It also shows how to use "the" when something has already been mentioned or is unique in the context.

1. Definite and
Indefinite

3. A bicycle
One bicycle

4. A
A
A

5. An elephant
One elephant

6. AN
AN
AN

7. A
A

8. An
An

9. A
An
An
An
A
A

10. A
A
AAn
An An

11. The
the

12. The
The

13. The
The

14. The
The