That is a UFO.改成否定句

That is a UFO.改成否定句 That is a green quilt.改成否定句 That is her backpack 改成否定句 That is my aunt.改成否定句 This is a UFO改为否定句还有This is a letter A 改为否定句 This is a pagoda.改成否定句 there is a book 改成否定句 That is a notebook怎么改成一般疑问句?还有 Itis Lucy is dictionary 怎么 改成 否定句? This is a pen ,That is her book怎么改成否定句 These are my sisters怎麼改成疑问和否定句 There is something wrong with that computer.改成否定句 Is this his sharpener?改成肯定句 还有That is her ruler改成否定句! That is a dog .改为否定句 That is a ruler 变为否定句 That is a ring 改为否定句 that is a bag改为否定句 You can see that is a pear.改成否定疑问句 There is a map on the wall .改成否定句 My mother is a doctor.（改成否定句）