Present Perfect Continous Tense

Affirmative
I have been drinking a cup of coffee.
You have been drinking a cup of coffee.
We have been drinking a cup of coffee.
They have been drinking a cup of coffee.
He has been drinking a cup of coffee.
She has been drinking a cup of coffee.
Guntur has been drinking a cup of coffee.
Father has been drinking a cup of coffee.
He and she have been drinking a cup of coffee.
Father and Guntur have been drinking a cup of coffee.

Negative
I have not been drinking a cup of coffee.
You have not been drinking a cup of coffee.
We have not been drinking a cup of coffee.
They have not been drinking a cup of coffee.
He has not been drinking a cup of coffee.
She has not been drinking a cup of coffee.
Guntur has not been drinking a cup of coffee.
Father has not been drinking a cup of coffee.
He and she have not been drinking a cup of coffee.
Father and Guntur have not been drinking a cup of coffee.

Interrogative
Have I been drinking a cup of coffee?
Have you been drinking a cup of coffee?
Have we been drinking a cup of coffee?
Have they been drinking a cup of coffee?
Has he been drinking a cup of coffee?
Has she been drinking a cup of coffee?
Has Guntur been drinking a cup of coffee?
Has father been drinking a cup of coffee?
Have he and she been drinking a cup of coffee?
Have father and Guntur been drinking a cup of coffee?

Negative Interrogative
Have I not been drinking a cup of coffee?
Have you not been drinking a cup of coffee?
Have we not been drinking a cup of coffee?
Have they not been drinking a cup of coffee?
Has he not been drinking a cup of coffee?
Has she not been drinking a cup of coffee?
Has Guntur not been drinking a cup of coffee?
Has father not been drinking a cup of coffee?
Have he and she not been drinking a cup of coffee?
Have father and Guntur not been drinking a cup of coffee?