Basic - The To Be Verb

Subject	To Be Verb	Contract Form
I	Am	I’m
You	Are	You’re
He	Is	He’s
She	Is	She’s
It	Is	It’s
We	Are	We’re
You	Are	You’re
They	Are	They’re

Note: Always when you see the TO BE verb in the phrase, it has to make part of any construction you do.

AFFIRMATIVE .:

I am a doctor

INTERROGATIVE.:

Am I a doctor?

NEGATIVE.:

I am not a doctor. 

(I'm not a doctor.)

The article 'a' has to be used all the time to express singular.

We use the article 'a' before words started for a consnant.

A Doctor

A Child

A Student

We use the article 'an' before words started for vowels.

AN Apple

AN Eraser

AN Old man