This is (a birthday card).对打括号的部分提问That's a pencil case.改为一般疑问句It's her desk.改为否定句

This is (a birthday card).对打括号的部分提问That's a pencil case.改为一般疑问句It's her desk.改为否定句
This is (a birthday card).对打括号的部分提问
That's a pencil case.改为一般疑问句
It's her desk.改为否定句

This is (a birthday card).对打括号的部分提问That's a pencil case.改为一般疑问句It's her desk.改为否定句
What is this?
Is that a pencil case?
It's not her desk.

What is this?
Is that a pencil case?
It isn't her desk