is it my pencil?(改为陈述句)

is it my pencil?(改为陈述句) That is my pencil sharpener.改为一般疑问句!It is my red eraser.改为同义句 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） 改为复句this is my pencil box is it a pencil?改为陈述句 It is my pencil.改成否定句 My pen is in my pencil case.(改为一般疑问句) There is a pen in my pencil case改为I () a pen in my pencil case That is my pencil box改为一般疑问句 This is my pencil case改为复数形式 That is my pencil case（改为一般疑问句） That is my pencil sharpener?(改为一般疑问句 My pen is in the pencil case改为一般疑问句? This is my pencil.(改为否定句,疑问句和回答) my eraser is in the pencil box.(改为一般疑问句) This is my pencil-box 改为同义句 my eraser is in the pencil case改为疑问句