This is my pencil 改为一般疑问句 并作肯定回答

改为复句this is my pencil box This is my pencil case改为复数形式 This is my pencil.(改为否定句,疑问句和回答) This is my pencil-box 改为同义句 This is my new pencil case 改为一般疑问句 this is my pencil box.改为否定句 IS this his book?改为复数句 This is my pencil.改为同义句 This is his pencil case改为一般否定句 This is my eraser 改为否定句 This is his pencil case改为一般否定句 This is my eraser 改为否定句 It's my pencil case 改为否定句This is her ruler 改为一般疑问句 This is my pencil.（改为复数句） It's his backpack.（改为复数句） This is your pencil.(改为一般疑问句) this is a pencil 改为一般疑问句 Is this pencil box?(改为陈述句) this is a pencil改为复数句 is this her pencil box?改为陈述句 This is his pencil.(改为否定句) is it my pencil?(改为陈述句)