THE VERB TO BE

1. Negative: Sujeto + am/is/are + not/n't (Exception: I'm not)

2. Interrogative: Am/Is/Are + sujeto

3. Express the age. E.g. I am ten years old

4. IS USED TO

5. ITS FORMS ARE

6. Express states and feelings. E.g: I am hungry

7. Talk about the weather. E.g: It's cold

8. Talk about professions, religions and nationalities. E.g: My brother is a lawyer

9. Talk about prices and measures. E.g: How much is it? It's three euros

10. Express general facts and definitions. E.g: Glasgow is in Scotland

11. AFIRMATIVE, NEGATIVE AND INTERROGATIVE

12. Afirmative: Subject + am/is/are

13. I AM, YOU ARE, HE IS, SHE IS, IT IS, WE ARE, YOU ARE, THEY ARE

14. I 'M NOT, YOU AREN'T, HE ISN'T, SHE ISN'T, IT ISN'T, WE AREN'T, YOU AREN'T, THEY AREN'T

15. AM I?, ARE YOU?, IS HE?, IS SHE?, IS IT?, ARE WE?, ARE YOU?, ARE THEY?