This is our new timetable.改成否定句.英文句

This is our new timetable.改成否定句.英文句 this is my ruler改成否定句 This is a pagoda.改成否定句 this is my eraser.改成否定句 This is a dog改成否定句 Is this a dictionary?改成否定句 This is his backpack.改成否定句 this is his ring改成否定句 如题：This card is as new as that one beautiful.(改成2种否定句) This is my new shirt改为否定句 This is a map of China(改成否定句） Is this your backpack?改成否定句怎么改