Помогите написать утверждение вопрос отрицание в английском языке с глаголами

..I am a doctor
I am not a doctor
Am I a doctor

We are playing football.
we aren't playing football.
are we playing football?

he is studying English.
he isn't studying English.
is he studying English?

Anna is sleeping.
Anna isn't sleeping
Is Anna sleeping?

I am writing.
I'm not writing.
Am I writing?