One of the keys to speaking and writing English correctly is mastery of the verb "to be." Below you will find the correct conjugations:
I am (first person singular)
You are (second person singular)
He is (third person singular)
She is (third person singular)
It is (third person singular)
We are (fist person plural)
You are (second person plural -- sometimes distinguished from the second person singular in the southern part of the United States by the usage "you-all are."
They are (third person plural)
I hope this helps your masquerade.