this is a pencil.(改为一般疑问句) this is a
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)
this is my eraser.(改为一般疑问句) Is it a pencil?(做肯定回答)
改为一般疑问句This is a nice schoolbag.改为否定句That's your pencil box.
This is a clock.(改为一般疑问句)
This is a boy.改为一般疑问句
This is a computer.(改为一般疑问句)
This is a ruler 改为一般疑问句
This is a ruler改为一般疑问句
This is a desk.(改为一般疑问句)