This is a pencil box 改为一般疑问句

This is a pencil box 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 a pencil box改为一般疑问句 并作肯定及否定回答 1、this is a pencil box.(改为一般疑问句，并作否定回答) this is a new pencil-box改我一般疑问句 this is a pencil.(改为一般疑问句) this is a This is a pencil sharpener.(改为一般疑问句) This is your pencil.(改为一般疑问句) his pencil box is under the sofa(改为一般疑问句) Her pencil box is under the sofa.改为一般疑问句 His pencil box is under the sofa.改为一般疑问句 Her watch is in the pencil box .(改为一般疑问句)