初一英语高手进！Is Mary in Class One?作否定回答
We're in Class One就划线部分提问（One划线）
They're friends.变为否定句
He's a student.变为一般疑问句
Is Mary in Class One?作否定回答
参考答案:We're in Class One就划线部分提问（One划线）
Are we in Class One?
They're friends.变为否定句
They are not friends.
He's a student.变为一般疑问句
Is he a student?
Is Mary in Class One?作否定回答
No, Mary is not in Class One.