it is my backpack(改为否定句) it（ ）my backpack.
问题描述：
it is my backpack(改为否定句) it（ ）my backpack.
答
it（isn't ）my backpack.
如还有疑问,欢迎可以进入乐知各级别英语外教课免费旁听.
希望能帮到您