They are old. 变成疑问句。
Are they old?
Is it a duck?
Yes, it is.
Is he tall?
Yes, he is.
It is a chair. 变成疑问句
Is it a chair?
Is it a duck?
Yes, it is. / No, it isn't.
(classroom)
It isn't a classroom.
It is a pencil. 变成疑问句
Is it a pencil?
Are they papers?
Yes, they are.
(book)
It isn't a book. It's a map.
(pens)
They aren't pens.
They are old. 变成疑问句。
Are they old?
Is she a girl?
Yes, she is.
Is it a baby?
Yes, it is. / No, it isn't.
Is he happy?
No, he isn't.
It is short. 变成疑问句
Is it short?
Is it a van?
Yes, it is.
