把This is a pencil.改为一般疑问句和否定句
问题描述:
把This is a pencil.改为一般疑问句和否定句
答
Is this a pencil?
This is not a pencil.
答
Is this a pencil?
No. This isn't a pencil.
答
Is this a pencil?
This isn't a pencil.
答
Is this a pencil?
What is this?
答
Is this a pencil?
This is not a pencil.