Задать вопрос по предложениям . И ответить на эти вопросы
You are singing now.
He is singing now.
She is singing now.
We are singing now.
They are singing now.

Are you singing now ?
Yes I am
No I am not

Is he singing now ?
Yes he is
No he isnt

Is she singing ?
Yes she is
No she isnt


Are we singing now?
Yes we are
No we arent

Are they singing now ?
Yes they are
No they arent