it is paper 改为否定句

it is paper 改为否定句 That is a piece of paper.(改为否定句） That( )( )a piece of paper. It is an orange改为否定句 It is an apple改为否定句 it is her eraser改为否定句 It is his book.改为否定句. It is an eraser .改为否定句 It is a computer.改为否定句 It is rainig(改为否定句) it is easy改为否定句 IT IS A WATERMELON 改为否定句 it is lucy is dictionary改为一般否定句 It is Tony is book.改为否定句 改为否定句I think it is inyour sister is It is time for lunch.改为否定句 It is going to rain.（改为否定句） It is my jacket.(改为否定句,疑问句和回答) It is an English book(改为否定句）