THE VERB TO BE AND THE RULES FOR INDEFINTE ARTICLES (A And AN)

1. A AND AN

2. INTERROGATIVO

2.1. ?

2.1.1. A.M

2.1.2. UN

2.1.2.1. WU, YOU AND THEY.

2.1.3. yo

2.1.3.1. HE, SHE AND IT.

3. TO BE

4. NEGATIVE

4.1. ||

4.1.1. AM NOT / 'M NOT

4.2. HE, SHE , IT.

4.2.1. IS NOT / ISN' T

4.3. WE, YOU, THEY

4.3.1. ARE NOT / AREN'T.

5. AFFIRMATIVE

5.1. I

5.1.1. AM

5.2. HE, SHE, IT.

5.2.1. IS

5.3. WE, YOU, THEY.

5.3.1. ARE