Сделайте предложения вопросительными и отрицательными: She is a doctor
Mary is 7
He is a boy
We are children
They are wonderful

She is a doctor  | She isn't a doctor | Is she a doctor?

Mary is 7 | Mary isn't 7 | Is Mary 7?

He is a boy  | He isn't a boy | Is he a boy?

We are children  | We aren't children | Are we children?

They are wonderful | They aren't wonderful | Are they wonderful?

Утвердительное предложение  

I/You, we, they/He, she, it + am/are/is

Отрицательное предложение  

I/You, we, they/He, she, it + am not ('m not)/are (aren't)/is (isn't)

Вопросительное предложение ❔

Am/Are/Is + I/You, we, they/He, she, it + ... ?