This is a dog改成否定句改成疑问句呢，并作肯定否定回答 还有It is a box并作肯定否定回答

This is a pagoda.改成否定句 This is a dog改成否定句改成疑问句呢，并作肯定否定回答 还有It is a box并作肯定否定回答 whose is this dog(改成同义句) This is a big dog改成感叹句 Is this a ruler?怎么改成否定句 this is my eraser.改成否定句 this is my ruler改成否定句 This is his backpack.改成否定句 my sister has a dog.改成否定句 That is a UFO.改成否定句 there is a book 改成否定句 chase the dog.如何改成否定句? This is our new timetable.改成否定句.英文句 Is this a dictionary?改成否定句Is this a dictionary?否定回答 （ it ( ).一个括号只能写一个单词 Is this his sharpener?改成肯定句 还有That is her ruler改成否定句! This shirt is very nice改成否定句 This apple is sweet.改成否定句,意思不变 This is the computer room.改成否定句 怎么改