She is girl 应该是She is a girl吧
变一般疑问句
Is she a girl?
变作肯定回答
Yes,she is a girl.
变作否定回答
No,she isn't a girl
Tom is my brother
变一般疑问句
Is Tom your brother?
变作肯定回答
Yes,Tom is my brother.
变作否定回答
No,Tom isn't my brother