this is a pencil 改为一般疑问句
this is a pencil.(改为一般疑问句) this is a
This is a pencil box 改为一般疑问句
This is a pencil sharpener.(改为一般疑问句)
This is your pencil.(改为一般疑问句)
改为一般疑问句This is a nice schoolbag.改为否定句That's your pencil box.
this is my eraser.(改为一般疑问句) Is it a pencil?(做肯定回答)
This is my pencil case.改为一般疑问句
将this is his pencil改为一般疑问句
This is your pencil sharpener.改为一般疑问句
把this is her pencil case 改为一般疑问句
This is my new pencil case 改为一般疑问句
This is a pencil case?(改为一般疑问句并做肯定回答)