it's good exercise改为否定句

it's good exercise改为否定句 It's a good idea.(改为否定句) He thinks it's good.改为否定句 It look good.改为否定句 I believe it's good for your health改为否定句I ()()()good for you It's a kite.改为否定句 It's an apple.(改为否定句) It's his jacket.改为否定句 It's cold today改为否定句 It's dangerous.(改为否定句） You need to exercise 改为否定句 It's good for exercise every